SB20260815120 - Use-after-free in Linux kernel ocfs2

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Main Vulnerability Database SB20260815120

SB20260815120 - Use-after-free in Linux kernel ocfs2

Published: August 15, 2026

Security Bulletin ID SB20260815120
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-74351)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to a use-after-free in the ocfs2 locking_state debugfs iterator when dumping raw LVB bytes from a copied lock resource after lockres teardown. A local user can read the debugfs locking_state output during a concurrent teardown to disclose sensitive information.

The issue occurs because a copied non-NULL sb_lvbptr can continue to reference the original lock resource after the tracking lock is dropped.


Remediation

Install update from vendor's website.

References