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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.

PUBLISHED Reserved 2026-03-31 | Published 2026-05-11 | Updated 2026-05-13 | Assigner VulnCheck




MEDIUM: 6.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

MEDIUM: 6.9CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')

Product status

Default status
unknown

Any version
affected

Credits

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

References

github.com/barebox/barebox product

github.com/barebox/barebox/releases/tag/v2026.04.0 patch

www.vulncheck.com/...parsing-infinite-loop-denial-of-service third-party-advisory

cve.org (CVE-2026-34962)

nvd.nist.gov (CVE-2026-34962)

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