Race condition in Linux kernel - CVE-2026-89681
Published: September 12, 2026
Vulnerability identifier: #VU149131
CSH Severity: Medium
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89681
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to leak layout stateids.
The vulnerability exists due to a race condition in the nfsd layout fence worker when a layout manager breaker timeout occurs while a fence worker is running. A remote attacker can trigger concurrent layout fence operations to leak layout stateids.
Affected software
Linux kernel
How to mitigate CVE-2026-89681
Install security update from vendor's repository.