Description
A stack overflow vulnerability was found in gfs2-utils. The metadata walk code in metawalk.c uses alloca() with an untrusted inode height value from on-disk metadata without bounds validation, causing stack exhaustion and a denial of service when processing crafted GFS2 filesystem images.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | gfs2-utils | 3.6.1-2 | — |
| Debian 13 | gfs2-utils | No fix yet | — |
| Debian 12 | gfs2-utils | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | gfs2-utils | No fix yet | — |
| Ubuntu 26.04 LTS | gfs2-utils | No fix yet | — |
| Ubuntu 24.04 LTS | gfs2-utils | No fix yet | — |
| Ubuntu 22.04 LTS | gfs2-utils | No fix yet | — |
| Ubuntu 20.04 LTS | gfs2-utils | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | gfs2-utils | No fix yet | — |
| Ubuntu 16.04 LTS | gfs2-utils | No fix yet | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | gfs2-utils | No fix yet | — |
References
- https://access.redhat.com/security/cve/CVE-2026-71224 vdb-entry
- RHBZ#2511397 issue-tracking