CVE-2026-71219 Gfs2-utils: gfs2-utils: stack overflow via alloca(1<<di_depth) in hash table traversal

What is CVE-2026-71219?

CVE-2026-71219 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 hash table traversal code in metawalk.c uses alloca() with an exponentially-derived size from the untrusted on-disk di_depth field without bounds validation. A crafted GFS2 filesystem image with a large di_depth value causes stack exhaustion and a denial of service when processed by fsck.gfs2, gfs2_edit, or savemeta.

Weakness: CWE-770

Which versions are affected by CVE-2026-71219?

It affects 1 product.

Products include Redhat Enterprise Linux.

How do I fix CVE-2026-71219?

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-2026-71219 being exploited?

There is no known exploitation of CVE-2026-71219 in the wild and no public exploit code.

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• CVE-2021-20325 Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a securit Critical 9.8
• CVE-2018-25011 Memory corruption in libwebp Critical 9.8
• CVE-2018-25014 Other in libwebp Critical 9.8
• CVE-2014-3585 Supply chain in redhat-upgrade-tool Critical 9.8

All Redhat Enterprise Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-99906, DEBIAN-CVE-2026-71219, GHSA-5ggp-489g-rjqr, UBUNTU-CVE-2026-71219.