Improper locking in Linux kernel - CVE-2026-89609
Published: September 12, 2026
Vulnerability identifier: #VU149202
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89609
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a race condition.
The vulnerability exists due to improper locking in ecryptfs_exorcise_daemon() when cleaning queued messages from a dying daemon. A local user can move queued message contexts to the free list without holding the required global list lock to trigger a race condition.
Affected software
Linux kernel
How to mitigate CVE-2026-89609
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3