Memory leak in Linux kernel - CVE-2026-64356
Published: July 27, 2026
Vulnerability identifier: #VU139606
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-64356
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-64356
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3