A stack out-of-bounds write vulnerability was found in gfs2-utils. In savemeta, the height value from on-disk inode metadata is used as a loop bound without bounds checking, causing a stack buffer overflow that may lead to arbitrary code execution when processing crafted GFS2 filesystem images.

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Fixes

Solution

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Workaround

Do not run gfs2-utils savemeta on untrusted or potentially compromised GFS2 filesystem images. Run gfs2-utils tools in a containerized or VM-isolated environment when processing untrusted images. Disable automatic fsck at boot for GFS2 filesystems until patches are applied by setting fs_passno to 0 in /etc/fstab.

History

Thu, 03 Sep 2026 12:45:00 +0000

Type Values Removed Values Added
Description A stack out-of-bounds write vulnerability was found in gfs2-utils. In savemeta, the height value from on-disk inode metadata is used as a loop bound without bounds checking, causing a stack buffer overflow that may lead to arbitrary code execution when processing crafted GFS2 filesystem images.
Title Gfs2-utils: gfs2-utils: stack out-of-bounds write via unchecked height in savemeta
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-787
CPEs cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-03T12:23:17.596Z

Reserved: 2026-08-05T08:51:19.853Z

Link: CVE-2026-71221

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-03T13:06:02.887

Modified: 2026-09-03T13:06:02.887

Link: CVE-2026-71221

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses