CVE-2026-64416

kernel: mm: swap_cgroup: fix NULL deref in lookup_swap_cgroup_id on swapless host

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · July 25, 2026

Updated · September 5, 2026

Description

A flaw was found in the Linux kernel's memory management subsystem, specifically within the swap cgroup functionality. When a system is configured without swap, a corrupted page table entry (PTE) can lead to a null pointer dereference during process exit. This vulnerability allows a local attacker to cause a system crash, resulting in a Denial of Service (DoS).

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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference