Quick answers
- Is CVE-2026-71221 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-71221 being exploited in the wild.
- How severe is CVE-2026-71221?
- High severity, with a CVSS score of 7, published 3 September 2026.
- Which products and versions are affected?
- Red Hat gfs2-utils.
- Is there a fix for CVE-2026-71221?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-71221 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-71221?
- Check whether you run Red Hat Gfs2-Utils. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
This is a classic out-of-bounds write vulnerability (CWE-787) in the savemeta component of gfs2-utils. The vulnerability stems from use of an unchecked height field from on-disk inode metadata as a loop bound without validation, causing the code to write beyond the bounds of a fixed-size stack buffer. The attack requires local access and user interaction—an administrator must explicitly run savemeta on a malicious GFS2 filesystem image. Successful exploitation can result in memory corruption, stack data overwrite, and arbitrary code execution. Red Hat compiler hardening provides partial mitigation. Patches are expected to be available in forthcoming gfs2-utils updates.
Affected products
- Red Hat gfs2-utils
Timeline
- 2026-09-03: disclosed