SB20260816361 - Improper access control in Linux kernel ocfs2

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Main Vulnerability Database SB20260816361

SB20260816361 - Improper access control in Linux kernel ocfs2

Published: August 16, 2026

Security Bulletin ID SB20260816361
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper access control (CVE-ID: CVE-2026-72164)

CWE-ID: CWE-284 - Improper Access Control

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


The vulnerability allows a local user to overwrite file data belonging to another inode.

The vulnerability exists due to improper allocation of occupied clusters in ocfs2_move_extent() and ocfs2_probe_alloc_group() when processing a non-auto OCFS2_IOC_MOVE_EXT operation with a user-supplied physical goal. A local user can supply a crafted occupied goal value to overwrite file data belonging to another inode.

The issue occurs when the supplied goal is at the end of the target block group or when the free-run start is miscalculated.


Remediation

Install update from vendor's website.

References