CVE-2026-71221

⚠️ high

Summary

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.

CVSS Score

7.0

High

EPSS Score

0.2

Exploit Probability

Published Date

2026-09-03

First Seen: 2026-09-04

📊 Relative Risk Intelligence

This CVE is Moderate Risk - more severe than 50.5% of all 365,863 vulnerabilities in our database.

#180,945

Above average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Sep 3, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Total

Complete system compromise possible

🏆 Discovered By

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

SSVC data provided by CISA

Last Modified 2026-09-22

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE IDs (Weakness Types)

CWE-787

📦 Affected Products 3

Vendor	Product	Status	Affected Versions
redhat	enterprise_linux	Affected	v7.0
redhat	enterprise_linux	Affected	v8.0
redhat	enterprise_linux	Affected	v9.0

🔗 References 2

https://access.redhat.com/security/cve/CVE-2026-71221

Vendor Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2511396

Issue Tracking Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-90462	🔶 medium	5.4	0.2	A flaw was found in SSSD. When configured with the LDAP access provider and `ldap_access_order` including `ppolicy` or `...	2026-09-22
CVE-2026-90996	🔶 medium	4.0	0.1	A flaw was found in sssd. A local unprivileged user could send a specially crafted request with a zero-length body to th...	2026-09-14
CVE-2026-71219	🔶 medium	4.7	0.1	A stack overflow vulnerability was found in gfs2-utils. The hash table traversal code in metawalk.c uses alloca() with a...	2026-09-03
CVE-2026-71220	⚠️ high	7.0	0.2	A stack out-of-bounds write vulnerability was found in gfs2-utils. In gfs2_edit, the di_height field from on-disk inode ...	2026-09-03
CVE-2026-71222	🔶 medium	5.3	0.1	A heap out-of-bounds read vulnerability was found in gfs2-utils. The ea_num_ptrs field from on-disk extended attribute m...	2026-09-03
CVE-2026-71224	🔶 medium	4.7	0.1	A stack overflow vulnerability was found in gfs2-utils. The metadata walk code in metawalk.c uses alloca() with an untru...	2026-09-03

These CVEs affect the same products