CVE-2026-43067

kernel: ext4: handle wraparound when searching for blocks for indirect mapped blocks

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · May 5, 2026

Updated · October 29, 2026

Description

A flaw was found in the ext4 filesystem within the Linux kernel. This vulnerability involves an issue where the system incorrectly handles block allocation for indirect mapped files, potentially allowing blocks to be allocated beyond their defined 32-bit limit. This could lead to data corruption or system instability.

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-190 · Integer Overflow or Wraparound