CVE-2026-46223

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 7.0.11-1.1

Description A deadlock occurs in the cgroup subsystem during the rmdir(2) operation. The issue arises when the process calling rmdir is also the reaper of a zombie process that pins a PID namespace teardown. In this scenario, rmdir blocks in TASK UNINTERRUPTIBLE state while waiting for PIDs to be freed; however, those PIDs cannot be freed because the reaper (such as systemd) is stuck in the rmdir call, resulting in a system-wide deadlock. This is caused by the cgroup drain dying() function waiting for tasks to leave the cgroup synchronously.

Recommendations Update to version 7.0.11-1.1 or newer.