Stack Buffer Overflow Vulnerability in gfs2-utils by Red Hat
CVE-2026-71221

7HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Vendor
CVE Published:
3 September 2026

What is CVE-2026-71221?

A stack out-of-bounds write vulnerability exists in gfs2-utils, specifically in the savemeta function. The height value derived from on-disk inode metadata is utilized as a loop bound without any bounds checking, resulting in a stack buffer overflow. This flaw can potentially allow for arbitrary code execution when handling specially crafted GFS2 filesystem images.

References

https://access.redhat.com/security/cve/CVE-2026-71221
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2511396
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Tristan Madani (Talence Security) for reporting this issue.
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