Improper control of a resource through its lifetime in Linux kernel - CVE-2026-64519
Published: July 27, 2026
Vulnerability identifier: #VU139409
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-64519
CWE-ID: CWE-664
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to improper state management in nfsd4_revoke_states() when revoking layout states. A remote user can trigger layout state revocation to cause a denial of service.
The issue can cause the revocation logic to loop indefinitely and hang the revoker.
How to mitigate CVE-2026-64519
Install security update from vendor's repository.