SB20260827104 - Improper locking in Linux kernel xfs scrub
Published: August 27, 2026
Security Bulletin ID
SB20260827104
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper locking (CVE-ID: CVE-2026-80535)
CWE-ID: CWE-667 - Improper Locking
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 improper locking in the xfs dirtree repair code when deleting a self-referential directory. A local user can trigger processing of a self-referential directory to cause a denial of service.
The issue occurs when the directory being repaired refers to the same inode as the directory entry target.
Remediation
Install update from vendor's website.