Description
barebox version prior to 2026.04.0 contains a denial-of-service vulnerability in ext4 directory parsing in fs/ext4/ext4_common.c where the ext4fs_iterate_dir() function fails to validate that directory entry length values are non-zero. Attackers can supply a malicious ext4 filesystem image with a crafted directory entry containing a direntlen value of 0 to cause an infinite loop during directory listing or path resolution, resulting in the boot process hanging indefinitely.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| barebox | barebox | — | — |
References
- https://github.com/barebox/barebox product
- barebox 2026.04.0 Release Notes patch release-notes
- https://www.vulncheck.com/advisories/barebox-ext4-directory-parsing-infinite-loop-denial-of-service third-party-advisory
- Blog Post technical-description