CVE-2023-54313

kernel: Linux kernel OverlayFS: Kernel crash via null pointer dereference in ovl_get_acl_rcu()

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · December 30, 2025

Updated · June 30, 2026

Description

A flaw was found in the OverlayFS (ovl) component of the Linux kernel. A local user can trigger a null pointer dereference by performing a specific sequence of file system operations. This vulnerability occurs when the ovl_get_acl_rcu() function attempts to access a real inode that has been set to NULL due to a race condition during inode destruction. Successful exploitation leads to a kernel crash, causing 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