CVE-2026-34962

Medium

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.

SeverityMedium

CVSS6.2

Exploit probability—

ProductPengutronix Barebox

PublishedMay 11, 2026

First seenMay 11, 2026

Weakness typeCWE-835CWE-835

How to fix

Update

pengutronix barebox2026.04.0 or later

Patches

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

Affected products

Product	Affected versions	Fixed in
pengutronix barebox	v < 2026.04.0	2026.04.0

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