CVE-2026-89595Medium· 5.5▾ SunlitA flaw was found in the Linux kernel's fsnotify subsystem, affecting fanotify and inotify. A race condition can occur during concurrent updates to event marks, where the object mask becomes stale. This can lead to a denial of service or in…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
— → 2.5
none → low
— → 2.5
none → low
0.2% → 0.2%
— → 2.5
none → low
Last analysed / modified upstream
2.5 → 5.5
low → medium
A flaw was found in the Linux kernel's fsnotify subsystem, affecting fanotify and inotify. A race condition can occur during concurrent updates to event marks, where the object mask becomes stale. This can lead to a denial of service or information disclosure, as events such as file modifications (e.g., FAN_MODIFY, IN_MODIFY) may not be properly reported to applications monitoring file system activity.
kernel: fsnotify: Fix stale object mask after concurrent mark updates — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-16.
Affected:
No fix planned:
Fix deferred
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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