Race condition in Linux kernel - CVE-2026-89595
Published: September 12, 2026
Vulnerability identifier: #VU149204
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89595
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause filesystem monitoring events to be missed.
The vulnerability exists due to a race condition in cached fsnotify object mask recalculation when concurrently updating fanotify or inotify marks on the same connector. A local user can issue concurrent mark updates to cause filesystem monitoring events to be missed.
Affected software
Linux kernel
How to mitigate CVE-2026-89595
Install security update from vendor's repository.