CVE-2026-46223

kernel: cgroup: Defer css percpu_ref kill on rmdir until cgroup is depopulated

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Severity

Unknown

Red Hat Product Security

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CVSS

Review impact separately from score.

Published · May 28, 2026

Updated · June 28, 2026

Description

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).

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CWE-833 · Deadlock