CVE-2026-45259

CVE-2026-45259 affects FreeBSD where sigqueue(2) was allowed in capability mode but kern_sigqueue lacked a capability-mode check to restrict signal delivery to the caller’s own PID. The issue enables a capability-mode sandboxed process to signal other processes (including SIGKILL/SIGSTOP) within ...

CVE-2026-45256

CVE-2026-45256 affects FreeBSD thr_kill2(2). The kernel failed to verify the result of p_cansignal() before delivering a signal, allowing unprivileged local users who know target PIDs to signal processes they normally could not, including root-owned ones. This can lead to stopping or terminating ...

CVE-2026-52946

In the Linux kernel, the following vulnerability has been resolved: fs/fcntl: fix SOFTIRQ-unsafe lock order in fasync signaling A SOFTIRQ-safe to SOFTIRQ-unsafe lock order deadlock can occur in sendsigio and sendsigurg when a process group receives a signal. When FASYNC is configured for a proces...