CVE-2026-58083 Use-after-free in kqueue copy-on-fork

While the kernel was copying knotes during fork, a knote with a timer-based filter could fire and be enqueued on the kqueue's active list before the copy was complete. The copy routine did not account for this and could enqueue the new knote a second time, corrupting the active list. In addition,...

FreeBSD : FreeBSD -- Use-after-free in kqueue copy-on-fork (a4e4a74c-8bb7-11f1-a6ab-bc241121aa0a)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the a4e4a74c-8bb7-11f1-a6ab-bc241121aa0a advisory. While the kernel was copying knotes during fork, a knote with a timer-based filter could fire and be...

FreeBSD-SA-26:50.kqueue

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:50.kqueue Security Advisory The FreeBSD Project Topic: Use-after-free in kqueue copy-on-fork Category: core Module: kqueue Announced: 2026-07-29 Credits:...

FreeBSD -- Use-after-free in kqueue copy-on-fork

Problem Description: While the kernel was copying knotes during fork, a knote with a timer-based filter could fire and be enqueued on the kqueue's active list before the copy was complete. The copy routine did not account for this and could enqueue the new knote a second time, corrupting the acti...

CVE-2026-45837

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix use-after-free in arenavmclose on fork arenavmopen only bumps vml-mmapcount but never registers the child VMA in arena-vmalist. The vml-vma always points at the parent VMA, so after parent munmap the pointer dangles. If...

CVE-2022-50674

CVE-2022-50674 affects the Linux kernel riscv architecture, specifically a NULL dereference in vdso_join_timens() during vfork. The issue manifests as kernel Oops with timens_commit/timens_on_fork traces when setting up vdso for a new process, as shown in the provided logs. The root cause is desc...