CVE-2026-71221: Gfs2-utils: gfs2-utils: stack out-of-bounds write via unchecked height in savemeta

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-03 · updated 2026-09-22
Weakness: CWE-787

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.

Affected products

Red Hat Enterprise Linux: 7.0, 8.0, 9.0

References

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

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