CVE-2026-71224 Gfs2-utils: gfs2-utils: stack overflow via alloca(i_height) in metadata walk
Attackers can cause a denial of service in GFS2 utilities by crafting filesystem images that trigger stack overflow via unvalidated metadata.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-71224?
CVE-2026-71224 is a medium-severity denial of service vulnerability in Redhat Enterprise Linux, published on 3 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A stack overflow vulnerability was found in gfs2-utils. The metadata walk code in metawalk.c uses alloca() with an untrusted inode height value from on-disk metadata without bounds validation, causing stack exhaustion and a denial of service when processing crafted GFS2 filesystem images.
Weakness: CWE-770
Which versions are affected by CVE-2026-71224?
It affects 1 product.
Products include Redhat Enterprise Linux.
How do I fix CVE-2026-71224?
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-2026-71224 being exploited?
There is no known exploitation of CVE-2026-71224 in the wild and no public exploit code.
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Sources
Also known as AZL-99909, DEBIAN-CVE-2026-71224, GHSA-84xm-vrh2-jhxq, UBUNTU-CVE-2026-71224.