CVE-2026-34962
barebox ext4 Directory Parsing Infinite Loop Denial of Service
CVSS Score
6.2
EPSS Score
0.1%
EPSS Percentile
3th
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.
| CWE | CWE-835 |
| Vendor | barebox |
| Product | barebox |
| Published | May 11, 2026 |
| Last Updated | Jul 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
barebox / barebox
0 < 2026.04.0
References
github.com: https://github.com/barebox/barebox github.com: https://github.com/barebox/barebox/releases/tag/v2026.04.0 vulncheck.com: https://www.vulncheck.com/advisories/barebox-ext4-directory-parsing-infinite-loop-denial-of-service y637f9qq2x.com: https://y637f9qq2x.com/posts/barebox-sandbox-vulns/
Credits
Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc.