CVE-2026-34962: Pengutronix Barebox

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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

• Pengutronix Barebox: before 2026.04.0 (fixed in 2026.04.0)

Published 2026-05-11. Last modified 2026-07-18.