CVE-2026-98972

kernel: cgroup/cpuset: Don't access cpuset_cgrp_subsys.root in is_in_v2_mode()

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Severity

Moderate

Red Hat Product Security

4.1

CVSS 3.1

Review impact separately from score.

Published · October 23, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel. A local user could trigger a use-after-free vulnerability when a control group (cgroup) filesystem is rebound, causing the cpuset subsystem to access a stale pointer. This flaw can lead to a Denial of Service (DoS) by crashing the system or potentially allow privilege escalation.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 4.1
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

CWE-825 · Expired Pointer Dereference