CVE-2026-31457

kernel: mm/damon/sysfs: check contexts->nr in repeat_call_fn

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Severity

Unknown

Red Hat Product Security

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CVSS

Review impact separately from score.

Published · April 22, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel. A local user can exploit this vulnerability by setting the nr_contexts parameter to zero via the DAMON sysfs interface while DAMON (Data Access MONitor) is active. This improper input validation leads to a NULL pointer dereference, which can cause a system crash and result in a Denial of Service (DoS).

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CWE-476 · NULL Pointer Dereference