---
id: CVE-2026-71219
title: A stack overflow vulnerability was found in gfs2-utils
summary: >-
  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 file…
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-770
vendor: redhat
product: enterprise_linux
affected:
  - enterprise_linux = 7.0
  - enterprise_linux = 8.0
  - enterprise_linux = 9.0
published: '2026-09-03'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T16:26:18.020'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71219'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-71219'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2507750'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00143
epssPercentile: 0.02918
ingestedAt: '2026-09-22T17:07:07.354Z'
---

## Overview

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

- `enterprise_linux = 7.0`
- `enterprise_linux = 8.0`
- `enterprise_linux = 9.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.