SB20260507158 - Improper control of a resource through its lifetime in Linux kernel xfs libxfs

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Main Vulnerability Database SB20260507158

SB20260507158 - Improper control of a resource through its lifetime in Linux kernel xfs libxfs

Published: May 7, 2026

Security Bulletin ID SB20260507158
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 control of a resource through its lifetime (CVE-ID: CVE-2026-43187)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: 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/E:U/U:Clear


The vulnerability allows a local user to cause data loss.

The vulnerability exists due to improper state management in the XFS extended attribute leaf freemap handling code when processing setxattr operations. A local user can set extended attributes in a way that causes xattr namevalue entries to be allocated on top of the entries array to cause data loss.

The issue involves zero-length freemap entries with a nonzero base and can lead to overlapping freemap entries with the same base but different sizes.


Remediation

Install update from vendor's website.

References