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Vulnerability · Published Sep 3, 2026 · Assigned by redhat

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

Medium 4.7

In plain English

A medium-severity resource allocation without limits in Red Hat Enterprise Linux 7 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.7Medium
Exploit odds (30 days)0.1%top 98.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12gfs2-utilsno fix listedDEBIAN-CVE-2026-71219
Debian:13gfs2-utilsno fix listedDEBIAN-CVE-2026-71219
Debian:14gfs2-utils3.6.1-2DEBIAN-CVE-2026-71219
Ubuntu:22.04:LTSgfs2-utilsno fix listedUBUNTU-CVE-2026-71219
Ubuntu:24.04:LTSgfs2-utilsno fix listedUBUNTU-CVE-2026-71219
Ubuntu:26.04:LTSgfs2-utilsno fix listedUBUNTU-CVE-2026-71219
Ubuntu:26.10gfs2-utilsno fix listedUBUNTU-CVE-2026-71219

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references

Weakness: CWE-770 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

References