CVE-2023-54305

kernel: ext4: refuse to create ea block when umounted

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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

In the Linux kernel, the following vulnerability has been resolved:

ext4: refuse to create ea block when umounted

The ea block expansion need to access s_root while it is already set as NULL when umount is triggered. Refuse this request to avoid panic.

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