SB20260815132 - Use-after-free in Linux kernel ocfs2 dlm

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260815132

SB20260815132 - Use-after-free in Linux kernel ocfs2 dlm

Published: August 15, 2026

Security Bulletin ID SB20260815132
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

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-2026-74348)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a use-after-free in the ocfs2 dlm locking_state debugfs open and release handling when opening the locking_state debugfs file during concurrent domain teardown. A local user can open and later close the debugfs file to cause a denial of service.

The issue occurs when the open path stores a raw dlm_ctxt pointer even if acquiring a reference fails, and the release path later accesses that context after it has been freed.


Remediation

Install update from vendor's website.

References