CVE-2026-97553 xfs: lock the healthmon when inserting unmount event
A race condition in the Linux kernel XFS health monitor allows local attackers to cause a denial of service via unlocked list insertion during unmount.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-97553?
CVE-2026-97553 is a vulnerability in Linux, published on 25 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
xfs: lock the healthmon when inserting unmount event
LOLLM complains that xfs_healthmon_unmount does an unlocked insert of the unmount event into the health monitor's event list. Fix that.
Which versions are affected by CVE-2026-97553?
How do I fix CVE-2026-97553?
Apply the vendor's patch.
Is CVE-2026-97553 being exploited?
There is no known exploitation of CVE-2026-97553 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-97553, GHSA-6jvx-47p2-rh3g, UBUNTU-CVE-2026-97553.