Vulnerability database
Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.
1,060 results · page 3 of 22
Jul 7, 2026sshd in OpenSSH before 10.4 does not always honor the minimum authentication delay.CVE-2026-60001 · Other software · OpenBSD · reported by MITREMedium 6.5
sshd in OpenSSH before 10.4 does not always honor the minimum authentication delay.
- Product
- OpenSSH
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 7, 2026sshd in OpenSSH before 10.4 allows remote attackers to cause a denial of service (resource consumption from excessive authentication attempts) because MaxAuthTrCVE-2026-60000 · Other software · OpenBSD · reported by MITRELow 3.7
sshd in OpenSSH before 10.4 allows remote attackers to cause a denial of service (resource consumption from excessive authentication attempts) because MaxAuthTries was mishandled for GSSAPIAuthentication.
- Product
- OpenSSH
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 7, 2026In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.CVE-2026-59999 · Other software · OpenBSD · reported by MITREMedium 5.9
In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.
- Product
- OpenSSH
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 7, 2026sshd in OpenSSH before 10.4 has an undocumented security-relevant behavior: GSSAPIStrictAcceptorCheck has no value if the server is in Windows Active Directory.CVE-2026-59998 · Other software · OpenBSD · reported by MITREMedium 4.8
sshd in OpenSSH before 10.4 has an undocumented security-relevant behavior: GSSAPIStrictAcceptorCheck has no value if the server is in Windows Active Directory.
- Product
- OpenSSH
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 7, 2026internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be important if a later command-line argument would hCVE-2026-59997 · Other software · OpenBSD · reported by MITREMedium 4.2
internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be important if a later command-line argument would have helped to ensure the intended security properties of an SFTP connection.
- Product
- OpenSSH
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 7, 2026scp in OpenSSH before 10.4 may place a file in the parent directory of an intended directory when the copy occurs between two remote destinations.CVE-2026-59996 · Other software · OpenBSD · reported by MITREMedium 4.2
scp in OpenSSH before 10.4 may place a file in the parent directory of an intended directory when the copy occurs between two remote destinations.
- Product
- OpenSSH
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 7, 2026sftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when "sftp server:/path ." is used with an attacker-controlled server.CVE-2026-59995 · Other software · OpenBSD · reported by MITREMedium 4.2
sftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when "sftp server:/path ." is used with an attacker-controlled server.
- Product
- OpenSSH
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 28, 2026Zephyr's BSD-sockets getaddrinfo() implementation (subsys/net/lib/sockets/getaddrinfo.c) passes a pointer to a stack-allocated state object (struct getaddrinfo_CVE-2026-10646 · Other software · zephyrproject · reported by vulnerabilities@zephyrproject.orgHigh 7.4
Zephyr's BSD-sockets getaddrinfo() implementation (subsys/net/lib/sockets/getaddrinfo.c) passes a pointer to a stack-allocated state object (struct getaddrinfo_state ai_state) as the user_data of an asynchronous DNS resolver query. The socket layer waits on a semaphore with a timeout deliberately set slightly longer than the resolver's own per-query timeout. When that semaphore wait nonetheless times out (-EAGAIN) - which can occur when the resolver's timeout work is delayed by workqueue contention, or in the documented multi-retry configuration where CONFIG_NET_SOCKETS_DNS_TIMEOUT exceeds CONFIG_NET_SOCKETS_DNS_BACKOFF_INTERVAL - the pre-fix code retries the query (goto again) without cancelling the previous one and without resetting the semaphore. The previous query slot remains active in the resolver with its callback and the stack pointer as user_data, and ai_state->dns_id is overwritten so the stale query can no longer be cancelled. A subsequent DNS response delivered over UDP and matched by its 16-bit transaction id (in dispatcher_cb()/dns_read()), or the resolver's own delayed query-timeout work, then invokes dns_resolve_cb() against the now out-of-scope stack frame, writin
- Product
- zephyr
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 27, 2026The CONS_HISTORY ioctl handler did not adequately validate the requested history size.CVE-2026-49416 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 7.8
The CONS_HISTORY ioctl handler did not adequately validate the requested history size. A large value caused an integer overflow in the buffer size calculation, resulting in a heap allocation smaller than expected. Subsequent initialization of the buffer wrote beyond the end of the allocation. An unprivileged local user with access to a vt(4) device can trigger an out-of-bounds write in the kernel, potentially escalating privileges.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 27, 2026The ELF image activator cleared per-process ASLR preference flags for setuid binaries after the code that computes the PIE base address, rather than before.CVE-2026-49414 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 7.8
The ELF image activator cleared per-process ASLR preference flags for setuid binaries after the code that computes the PIE base address, rather than before. As a result, a user-requested ASLR disable was still in effect at the point where the base address was chosen. An unprivileged local user can disable ASLR for a setuid PIE binary by calling procctl(2) before execve(2). This makes exploitation of any separate memory corruption vulnerability in that binary significantly easier.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 27, 2026Second, the audio buffer backing a mapping could be freed when the device was closed even though the mapping remained valid.CVE-2026-49417 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 7
Second, the audio buffer backing a mapping could be freed when the device was closed even though the mapping remained valid. The freed memory could then be reused elsewhere while still accessible through the stale mapping. The /dev/dsp device nodes are world-accessible by default. On a system with an audio device, either issue allows an unprivileged local user to read and write kernel memory, which can be used to escalate privileges, potentially gaining full control of the affected system. At a minimum, an attacker can crash the kernel, resulting in a Denial of Service (DoS).
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 27, 2026The Linuxulator determined whether a binary was set-user-ID or set-group-ID by checking the P_SUGID process flag.CVE-2026-49413 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 7.1
The Linuxulator determined whether a binary was set-user-ID or set-group-ID by checking the P_SUGID process flag. During execve(2), this flag is not yet set at the point where the auxiliary vector is constructed, so AT_SECURE was incorrectly set to zero for set-user-ID and set-group-ID executables. An unprivileged local user can inject a shared library via LD_PRELOAD into a set-user-ID or set-group-ID Linux binary, gaining the privileges of that binary.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 27, 2026The kernel handler for IPV6_MSFILTER dropped a serializing lock in order to copy the source-filter list from userspace, then reacquired the lock.CVE-2026-49412 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 7.8
The kernel handler for IPV6_MSFILTER dropped a serializing lock in order to copy the source-filter list from userspace, then reacquired the lock. During this window another thread could free the multicast filter structure, leaving the handler with a stale pointer to freed memory. An unprivileged local user can exploit this use-after-free to escalate privileges.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 27, 2026sigqueue(2) was marked as permitted in capability mode with the introduction of Capsicum in 2011, but the implementation of kern_sigqueue did not include a capaCVE-2026-45259 · Other software · FreeBSD · reported by secteam@freebsd.orgMedium 6.5
sigqueue(2) was marked as permitted in capability mode with the introduction of Capsicum in 2011, but the implementation of kern_sigqueue did not include a capability mode check restricting signal delivery to the calling process's own PID. A process in capability mode can use sigqueue(2) to send signals to any process it could signal following standard Unix permissions, bypassing the Capsicum sandbox restriction. A compromised sandboxed process could interfere with other processes, for example by sending SIGKILL or SIGSTOP. This could be any process running as the same user, or any process, for a superuser sandboxed process.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 27, 2026dsp_mmap_single() validated the requested mapping by checking the sum of the user-supplied offset and length against the buffer size.CVE-2026-45258 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 7.8
dsp_mmap_single() validated the requested mapping by checking the sum of the user-supplied offset and length against the buffer size. This addition could overflow, so that a large offset and length wrapped around and passed the check. The offset was then narrowed from 64 to 32 bits when converted to a buffer address, yielding a mapping that extended past the audio buffer into unrelated kernel memory. The /dev/dsp device nodes are world-accessible by default. On a system with an audio device, either issue allows an unprivileged local user to read and write kernel memory, which can be used to escalate privileges, potentially gaining full control of the affected system. At a minimum, an attacker can crash the kernel, resulting in a Denial of Service (DoS).
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 26, 2026The KTLS receive path decrypted each record in place, assuming that the mbufs holding received data were anonymous and safe to modify.CVE-2026-45257 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 7.8
The KTLS receive path decrypted each record in place, assuming that the mbufs holding received data were anonymous and safe to modify. This assumption does not hold for data placed on a socket by sendfile(2), which can reference file-backed memory directly through non-anonymous M_EXTPG pages or EXT_SFBUF mbufs. When the sender transmits such data over a loopback connection without enabling KTLS on the transmit side, the file-backed mbufs reach the receiver's decryption path unchanged. Decrypting a record in place then overwrites the backing file's page cache instead of a private copy of the data. An unprivileged local user who can read a file can overwrite its contents with data of their choosing by sending the file over a loopback connection on which they have enabled KTLS receive. The write modifies the page cache directly, so it bypasses file flags such as schg and is written back to disk. By overwriting a setuid binary or other trusted file, a local user can escalate privileges, potentially gaining full control of the affected system.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecurity.freebsd.orgopenwall.com
Jun 26, 2026When used to deliver a signal to a specific thread, thr_kill2(2) called p_cansignal() to determine whether the operation was permitted but did not check the resCVE-2026-45256 · Other software · FreeBSD · reported by secteam@freebsd.orgMedium 5.5
When used to deliver a signal to a specific thread, thr_kill2(2) called p_cansignal() to determine whether the operation was permitted but did not check the result before delivering the signal. The signal was sent even when the permission check failed. The system call returned the resulting error to the caller, but by then the signal had already been delivered. The missing check allows an unprivileged local user who knows or can guess a target's process and thread IDs to send any signal to a process they would not normally be permitted to signal, including processes owned by other users or by root. The same check enforces jail boundaries, so a jailed process can signal processes on the host or in other jails. Thread IDs are allocated globally and sequentially, and so can be discovered by brute force with no visibility into the target. An attacker can stop or terminate arbitrary processes, including critical system daemons, resulting in a Denial of Service (DoS).
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 24, 2026sys/kern/sysv_sem.c in OpenBSD through 7.9 has a use-after-free allowing local privilege escalation to root.CVE-2026-57589 · Other software · OpenBSD · reported by MITREHigh 7.4
sys/kern/sysv_sem.c in OpenBSD through 7.9 has a use-after-free allowing local privilege escalation to root. This is a context switch use-after-free after tsleep in sys_semget().
- Product
- OpenBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 18, 2026OpenBSD before commit 6a23123 (2026-06-18) contains an out-of-bounds read vulnerability in the mpls_do_error function within sys/netmpls/mpls_input.c that allowCVE-2026-56099 · Other software · openbsd · reported by VulnCheckMedium 6.9
OpenBSD before commit 6a23123 (2026-06-18) contains an out-of-bounds read vulnerability in the mpls_do_error function within sys/netmpls/mpls_input.c that allows remote attackers to disclose kernel stack memory by sending crafted MPLS frames with 16 labels and no Bottom-of-Stack bit set.
- Product
- src
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgithub.compop.argus-systems.ai
Jun 17, 2026sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.CVE-2026-55706 · Other software · OpenBSD · reported by MITREMedium 5.8
sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.
- Product
- OpenBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordblog.argus-systems.aigithub.com
May 21, 2026When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list of network names and use bsddialog(1) to prompt the user to seCVE-2026-45255 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 7.5
When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list of network names and use bsddialog(1) to prompt the user to select a network. This is implemented using a shell script, and the code which handled network names was not careful to prevent expansion by the shell. As a result, a suitably crafted network name can be used to execute commands via a subshell. The problem can be exploited to execute code as root on the system running bsdinstall or bsdconfig. The attacker would need to create an access point with a specially crafted name and be within range of a Wi-Fi scan. Note that bsdinstall and bsdconfig are vulnerable as soon as the user prompts them to scan for nearby networks; they do not need to actually select the malicious network.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 21, 2026In the case of the cap_net service, when a key present in the old limit was omitted from the new limit, the missing key was treated as "allow any" instead of beCVE-2026-45254 · Other software · FreeBSD · reported by secteam@freebsd.orgMedium 6.5
In the case of the cap_net service, when a key present in the old limit was omitted from the new limit, the missing key was treated as "allow any" instead of being rejected. In certain scenarios, an application that had previously restricted a subset of network operations could ask for a new limit that extended the permissions of the process.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 21, 2026ptrace(PT_SC_REMOTE) failed to properly validate parameters for the syscall(2) and __syscall(2) meta-system calls.CVE-2026-45253 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 8.4
ptrace(PT_SC_REMOTE) failed to properly validate parameters for the syscall(2) and __syscall(2) meta-system calls. As a result, a user with the ability to debug a process may trigger arbitrary code execution in the kernel, even if the target process has no special privileges. The missing validation allows an unprivileged local user to escalate privileges, potentially gaining full control of the affected system.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 21, 2026When a fusefs file system implements extended attributes, the kernel may send a FUSE_LISTXATTR message to the userspace daemon to retrieve the list of extended CVE-2026-45252 · Other software · FreeBSD · reported by secteam@freebsd.orgMedium 5.5
When a fusefs file system implements extended attributes, the kernel may send a FUSE_LISTXATTR message to the userspace daemon to retrieve the list of extended attributes for a given file. The FUSE protocol requires the daemon to return a packed list of NUL-terminated strings. The fusefs kernel module calls strlen() on this daemon-supplied buffer without first verifying that the entire list is NUL-terminated. If a malicious daemon sends a non-NUL-terminated list, the fusefs kernel module may read beyond the end of one heap-allocated buffer and potentially write beyond the end of a second buffer. A malicious daemon could disclose up to 253 bytes of kernel heap memory, or it could inject up to 250 attacker-controlled bytes into unallocated kernel heap space.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 21, 2026A file descriptor can be closed while a thread is blocked in a poll(2) or select(2) call waiting for that descriptor.CVE-2026-45251 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 7.8
A file descriptor can be closed while a thread is blocked in a poll(2) or select(2) call waiting for that descriptor. Because the blocked thread does not hold a reference to the underlying object, this closure may result in the object being freed while the thread remains blocked. In this situation, the kernel must remove the blocked thread from the per-object wait queue prior to freeing the object. In the case of some file descriptor types, the kernel failed to unlink blocked threads from the object before freeing it. When the blocked thread is subsequently woken, it accesses memory that has already been freed resulting in a use-after-free vulnerability. The use-after-free vulnerability may be triggered by an unprivileged local user and can be exploited to obtain superuser privileges.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 21, 2026libcasper(3) communicates with helper processes via UNIX domain sockets, and uses the select(2) system call to wait for data to become available.CVE-2026-39461 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 8.8
libcasper(3) communicates with helper processes via UNIX domain sockets, and uses the select(2) system call to wait for data to become available. However, it does not verify that its socket descriptor fits within select(2)'s descriptor set size limit of FD_SETSIZE (1024). An attacker able to cause an application using libcasper(3) to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, may trigger stack corruption. If the target application runs with setuid root privileges, this could be used to escalate local privileges.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 21, 2026The setcred(2) system call is only available to privileged users.CVE-2026-45250 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 7.8
The setcred(2) system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capacity of that buffer, a stack buffer overflow occurs. Because the bounds check on the supplementary groups list occurs after the kernel stack buffer has already been written, an unprivileged local user may trigger the overflow without holding any special privilege. Successful exploitation may allow an attacker to execute arbitrary code in the context of the kernel, allowing an unprivileged local user to gain elevated privileges on the affected system.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecurity.freebsd.orgopenwall.com
May 18, 2026NetBSD prior to commit ec8451e contains a signed integer overflow vulnerability in the cryptodev_op() function in sys/opencrypto/cryptodev.c where the local varCVE-2026-32849 · Other software · NetBSD · reported by VulnCheckMedium 5.7
NetBSD prior to commit ec8451e contains a signed integer overflow vulnerability in the cryptodev_op() function in sys/opencrypto/cryptodev.c where the local variable iov_len is declared as a signed int but assigned from an unsigned cop->dst_len value, causing undefined behavior when cop->dst_len exceeds INT_MAX. A local attacker with access to /dev/crypto and a compression session type can exploit this vulnerability by providing a dst_len value exceeding INT_MAX to trigger a kernel panic through NULL pointer dereference when CONFIG_SVS is disabled and corrupted UIO pointer arithmetic.
- Product
- src
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 18, 2026NetBSD prior to commit ec8451e contains a race condition vulnerability in cryptodev_op() within the opencrypto subsystem that allows local attackers to trigger CVE-2026-32848 · Other software · NetBSD · reported by VulnCheckMedium 5.7
NetBSD prior to commit ec8451e contains a race condition vulnerability in cryptodev_op() within the opencrypto subsystem that allows local attackers to trigger a double-free condition by concurrently issuing CIOCCRYPT operations on the same session identifier on SMP systems. Attackers can exploit mutable per-operation state embedded in the csession struct to corrupt kernel heap memory.
- Product
- src
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 13, 2026OPNsense is a FreeBSD based firewall and routing platform.CVE-2026-45158 · Other software · opnsense · reported by GitHubCritical 9.1
OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.8, unsanitized user input is passed to the DHCP configuration of the configured interface, which is processed by a shell script, allowing remote code execution as root on the underlying operating system. This vulnerability is fixed in 26.1.8.
- Product
- core
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 13, 2026OPNsense is a FreeBSD based firewall and routing platform.CVE-2026-44195 · Other software · opnsense · reported by GitHubMedium 5.3
OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.7, a logic flaw in the OPNsense lockout_handler allows an unauthenticated attacker to continuously reset the authentication failure counter for their IP address. By interjecting a crafted username containing a success keyword ("Accepted" or "Successful login") between normal brute-force attempts, an attacker can prevent the failure counter from ever reaching the lockout threshold. This vulnerability is fixed in 26.1.7.
- Product
- core
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgithub.comgist.github.com
May 13, 2026OPNsense is a FreeBSD based firewall and routing platform.CVE-2026-44194 · Other software · opnsense · reported by GitHubCritical 9.1
OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.8, an authenticated Remote Code Execution (RCE) vulnerability in the OPNsense core allows a user with user-management privileges to execute arbitrary system commands as root. An attacker can bypass input validation by formatting their malicious payload as a compliant email address, allowing shell commands to reach the underlying operating system. The flaw exists in the local user synchronization flow, within core/src/opnsense/scripts/auth/sync_user.php. This vulnerability is fixed in 26.1.8.
- Product
- core
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 13, 2026OPNsense is a FreeBSD based firewall and routing platform.CVE-2026-44193 · Other software · opnsense · reported by GitHubCritical 9.1
OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.7, the XMLRPC method opnsense.restore_config_section fails to sanitize user supplied input leading to Remote Code Execution. This vulnerability is fixed in 26.1.7.
- Product
- core
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 30, 2026As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers.CVE-2026-42512 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 8.1
As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers. The code which expands the array incorrectly calculates its new size when requesting memory, resulting in a heap buffer overrun. A specially crafted packet can cause dhclient to overrun its buffer of environment entries. This can result in a crash, but it may be possible to leverage this bug to achieve remote code execution.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 30, 2026When exchanging data over a socket, libnv uses select(2) to wait for data to arrive.CVE-2026-39457 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 7.8
When exchanging data over a socket, libnv uses select(2) to wait for data to arrive. However, it does not verify whether the provided socket descriptor fits in select(2)'s file descriptor set size limit of FD_SETSIZE (1024). An attacker who is able to force a libnv application to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, can trigger stack corruption. If the target application is setuid-root, then this could be used to elevate local privileges.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 30, 2026When processing the header of an incoming message, libnv failed to properly validate the message size.CVE-2026-35547 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 8.1
When processing the header of an incoming message, libnv failed to properly validate the message size. The lack of validation allows a malicious program to write outside the bounds of a heap allocation. This can trigger a crash or system panic, and it may be possible for an unprivileged user to exploit the bug to elevate their privileges.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 30, 2026Incorrect packet validation allowed unbounded recursion parsing SCTP chunk parameters.CVE-2026-7164 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 7.5
Incorrect packet validation allowed unbounded recursion parsing SCTP chunk parameters. This can eventually result in a stack overflow and panic. Remote attackers can craft packets which cause affected systems to panic. This affects any system where pf is configured to process traffic, independent of the configured ruleset.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 30, 2026An operator precedence bug in the kernel results in a scenario where a buffer overflow causes attacker-controlled data to overwrite adjacent execve(2) argument CVE-2026-7270 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 7.8
An operator precedence bug in the kernel results in a scenario where a buffer overflow causes attacker-controlled data to overwrite adjacent execve(2) argument buffers. The bug may be exploitable by an unprivileged user to obtain superuser privileges.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecurity.freebsd.orgblog.calif.io
Apr 30, 2026The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives.CVE-2026-42511 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 8.1
The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives. When the lease file is subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to dhclient-script(8), which evaluates it. A rogue DHCP server may be able to execute arbirary code as root on a system running dhclient.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 21, 2026In order to apply a particular protection key to an address range, the kernel must update the corresponding page table entries.CVE-2026-6386 · Other software · FreeBSD · reported by secteam@freebsd.orgMedium 6.2
In order to apply a particular protection key to an address range, the kernel must update the corresponding page table entries. The subroutine which handled this failed to take into account the presence of 1GB largepage mappings created using the shm_create_largepage(3) interface. In particular, it would always treat a page directory page entry as pointing to another page table page. The bug can be abused by an unprivileged user to cause pmap_pkru_update_range() to treat userspace memory as a page table page, and thus overwrite memory to which the application would otherwise not have access.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 21, 2026The implementation of TIOCNOTTY failed to clear a back-pointer from the structure representing the controlling terminal to the calling process' session.CVE-2026-5398 · Other software · FreeBSD · reported by secteam@freebsd.orgHigh 8.4
The implementation of TIOCNOTTY failed to clear a back-pointer from the structure representing the controlling terminal to the calling process' session. If the invoking process then exits, the terminal structure may end up containing a pointer to freed memory. A malicious process can abuse the dangling pointer to grant itself root privileges.
- Product
- FreeBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 20, 2026In OpenBSD through 7.8, the slaacd and rad daemons have an infinite loop when they receive a crafted ICMPv6 Neighbor Discovery (ND) option (over a local networkCVE-2026-41285 · Other software · OpenBSD · reported by MITREMedium 4.3
In OpenBSD through 7.8, the slaacd and rad daemons have an infinite loop when they receive a crafted ICMPv6 Neighbor Discovery (ND) option (over a local network) with length zero, because of an "nd_opt_len * 8 - 2" expression with no preceding check for whether nd_opt_len is zero.
- Product
- OpenBSD
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 9, 2026OPNsense is a FreeBSD based firewall and routing platform.CVE-2026-34578 · Other software · opnsense · reported by GitHubHigh 8.2
OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.6, OPNsense's LDAP authentication connector passes the login username directly into an LDAP search filter without calling ldap_escape(). An unauthenticated attacker can inject LDAP filter metacharacters into the username field of the WebGUI login page to enumerate valid LDAP usernames in the configured directory. When the LDAP server configuration includes an Extended Query to restrict login to members of a specific group, the same injection can be used to bypass that group membership restriction and authenticate as any LDAP user whose password is known, regardless of group membership. This vulnerability is fixed in 26.1.6.
- Product
- core
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 6, 2026SDL_image is a library to load images of various formats as SDL surfaces.CVE-2026-35444 · Other software · libsdl-org · reported by GitHubHigh 7.1
SDL_image is a library to load images of various formats as SDL surfaces. In do_layer_surface() in src/IMG_xcf.c, pixel index values from decoded XCF tile data are used directly as colormap indices without validating them against the colormap size (cm_num). A crafted .xcf file with a small colormap and out-of-range pixel indices causes heap out-of-bounds reads of up to 762 bytes past the colormap allocation. Both IMAGE_INDEXED code paths are affected (bpp=1 and bpp=2). The leaked heap bytes are written into the output surface pixel data, making them potentially observable in the rendered image. This vulnerability is fixed with commit 996bf12888925932daace576e09c3053410896f8.
- Product
- SDL_image
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 6, 2026Ajenti is a Linux and BSD modular server admin panel.CVE-2026-35175 · Other software · ajenti · reported by GitHubHigh 7.2
Ajenti is a Linux and BSD modular server admin panel. Prior to 2.2.15, an authenticated user (using the auth_users plugin authentication method) could install a custom package even if this user is not superuser. This vulnerability is fixed in 2.2.15.
- Product
- ajenti
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 2, 2026OpenSSH before 10.3 mishandles the authorized_keys principals option in uncommon scenarios involving a principals list in conjunction with a Certificate AuthoriCVE-2026-35414 · Other software · OpenBSD · reported by MITREMedium 4.2
OpenSSH before 10.3 mishandles the authorized_keys principals option in uncommon scenarios involving a principals list in conjunction with a Certificate Authority that makes certain use of comma characters.
- Product
- OpenSSH
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 2, 2026OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.CVE-2026-35388 · Other software · OpenBSD · reported by MITRELow 2.5
OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.
- Product
- OpenSSH
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 2, 2026OpenSSH before 10.3 can use unintended ECDSA algorithms.CVE-2026-35387 · Other software · OpenBSD · reported by MITRELow 3.1
OpenSSH before 10.3 can use unintended ECDSA algorithms. Listing of any ECDSA algorithm in PubkeyAcceptedAlgorithms or HostbasedAcceptedAlgorithms is misinterpreted to mean all ECDSA algorithms.
- Product
- OpenSSH
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 2, 2026In OpenSSH before 10.3, command execution can occur via shell metacharacters in a username within a command line.CVE-2026-35386 · Other software · OpenBSD · reported by MITRELow 3.6
In OpenSSH before 10.3, command execution can occur via shell metacharacters in a username within a command line. This requires a scenario where the username on the command line is untrusted, and also requires a non-default configurations of % in ssh_config.
- Product
- OpenSSH
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 2, 2026In OpenSSH before 10.3, a file downloaded by scp may be installed setuid or setgid, an outcome contrary to some users' expectations, if the download is performeCVE-2026-35385 · Other software · OpenBSD · reported by MITREHigh 7.5
In OpenSSH before 10.3, a file downloaded by scp may be installed setuid or setgid, an outcome contrary to some users' expectations, if the download is performed as root with -O (legacy scp protocol) and without -p (preserve mode).
- Product
- OpenSSH
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.
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