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CVE-2026-46121

kernel: mm/damon/sysfs-schemes: protect memcg_path kfree() with damon_sysfs_lock

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · May 28, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's DAMON (Data Access MONitor) sysfs interface. A race condition exists between read and write operations on the memcg_path and path files. This allows a local attacker, by performing concurrent reads and writes with separate file handles, to trigger a use-after-free vulnerability. This could lead to a denial of service or potentially enable 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 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition