Low [CVE-2026-89595] Linux kernel: fsnotify race condition leads to lost events
This low-severity Red Hat Linux advisory covers CVE-2026-89595.
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Summary
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. Red Hat severity: Low — CVSS 2.5 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L).
Weakness: CWE-367.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 37 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 37 minutes ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 37 minutes ago·verify at source
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