SB20260727209 - Memory leak in Linux kernel xfs libxfs
Published: July 27, 2026
Security Bulletin ID
SB20260727209
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) Memory leak (CVE-ID: CVE-2026-64356)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
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 memory leak in xfs_dqinode_metadir_create() when handling failures during metadirectory creation and commit processing. A local user can trigger the vulnerable error paths to cause a denial of service.
Runtime validation reproduced a stuck mount path during mount -o uquota on a metadir XFS image under fault injection.
Remediation
Install update from vendor's website.