CVE-2026-97542 xfs: bail out on bitmap errors in xrep_agfl_fill
A missing error check in the XFS filesystem repair code can lead to inconsistent data and potential system instability or denial of service.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-97542?
CVE-2026-97542 is a denial of service 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: bail out on bitmap errors in xrep_agfl_fill
LOLLM also points out that the xagb_bitmap_set call in xrep_agfl_fill can fail, but we don't check the result of xagb_bitmap_walk, so we silently drop the error and proceed with inconsistent incore data. That shouldn't be allowed.
Which versions are affected by CVE-2026-97542?
How do I fix CVE-2026-97542?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-97542 being exploited?
There is no known exploitation of CVE-2026-97542 in the wild and no public exploit code.
Sources
Also known as AZL-104478, BELL-CVE-2026-97542, DEBIAN-CVE-2026-97542, GHSA-jp6c-38x7-hq3p, UBUNTU-CVE-2026-97542.