CVE-2026-34962

MEDIUM 6.2

barebox ext4 Directory Parsing Infinite Loop Denial of Service

CVSS Score

6.2

EPSS Score

0.0%

EPSS Percentile

0th

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	May 13, 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

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc.