SB2026050925 - Improper input validation in Linux kernel xfs

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Main Vulnerability Database SB2026050925

SB2026050925 - Improper input validation in Linux kernel xfs

Published: May 9, 2026

Security Bulletin ID SB2026050925
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) Improper input validation (CVE-ID: CVE-2026-43365)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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

The vulnerability exists due to improper input validation in XFS log roundoff handling when mounting or recovering a crafted XFS filesystem with a malformed superblock. A local user can provide a specially crafted filesystem image to cause filesystem corruption and a denial of service.

The issue can result in corrupt logs and an unmountable filesystem on systems using 4k physical sectors.


Remediation

Install update from vendor's website.

References