A stack overflow vulnerability was found in gfs2-utils. (CVE-2026-71224)
Description
A stack overflow vulnerability exists in gfs2-utils due to unvalidated use of an inode height value from on-disk metadata in the metadata walk code. This flaw can cause stack exhaustion and denial of service when processing crafted GFS2 filesystem images. The vulnerability affects multiple specific versions of gfs2-utils. The CVSS score is 4.7, indicating medium severity. No known exploits are reported in the wild. Patch status is not confirmed from the provided data.
CVSS v3.1
Score 4.7medium
Affected software
pkg:deb/ubuntu/gfs2-utils?arch=source&distro=xenialpkg:deb/ubuntu/gfs2-utils?arch=source&distro=bionicpkg:deb/ubuntu/gfs2-utils?arch=source&distro=focalpkg:deb/ubuntu/gfs2-utils?arch=source&distro=jammypkg:deb/ubuntu/gfs2-utils?arch=source&distro=noblepkg:deb/ubuntu/gfs2-utils?arch=source&distro=stonkingpkg:deb/ubuntu/gfs2-utils?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in gfs2-utils (CVE-2026-71224) arises from the use of alloca() in metawalk.c with an untrusted inode height value obtained from on-disk metadata. Because this value is not bounds-checked, it can lead to stack exhaustion and denial of service when processing specially crafted GFS2 filesystem images. This is a medium severity issue with a CVSS 3.1 score of 4.7, reflecting local attack vector, high attack complexity, no privileges required, user interaction required, and impact limited to availability.
Potential Impact
An attacker who can cause the system to process a crafted GFS2 filesystem image may trigger a stack overflow leading to denial of service. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted or suspicious GFS2 filesystem images to mitigate risk.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-71224
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad3f5952cdf04f6566626d7
Added to database: 10/17/2026, 22:24:21 UTC
Last enriched: 10/17/2026, 23:50:15 UTC
Last updated: 10/17/2026, 23:50:15 UTC
Views: 3
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