A flaw was found in the Linux kernel's cgroup subsystem. This vulnerability occurs during the rmdir operation when the process initiating the rmdir is also responsible for cleaning up zombie processes that are holding onto process namespace (pidns) resources. This specific scenario can lead to a system deadlock, causing the system to become unresponsive and resulting in a Denial of Service (DoS).

Red Hat Enterprise Linux 10 Not affected kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Not affected kernel Red Hat Enterprise Linux 9 Not affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-46223 https://nvd.nist.gov/vuln/detail/CVE-2026-46223 https://lore.kernel.org/linux-cve-announce/2026052837-CVE-2026-46223-3e37@gregkh/T