CVE-2026-71224
Gfs2-utils: gfs2-utils: stack overflow via alloca(i_height) in metadata walk
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What happened?
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 software and versions
| Software | Version information | Fixed version |
|---|---|---|
| gfs2-utilsRed Hat | Default status: affected | See vendor advisory |
| gfs2-utilsRed Hat | Default status: affected | See vendor advisory |
| gfs2-utilsRed Hat | Default status: affected | See vendor advisory |
Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.
Is it being exploited?
This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.
How to respond
- Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
- Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
- Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.