CVE-2026-34961: Pengutronix Barebox

High severity, CVSS 7.7. EPSS: 0.2% chance of exploitation in the next 30 days.

barebox prior to version 2026.04.0 contains out-of-bounds read vulnerabilities in ext4 extent parsing due to missing validation of the eh_entries field against buffer capacity in fs/ext4/ext4_common.c. Attackers can supply a malicious ext4 filesystem image via USB, SD card, or network boot to trigger heap out-of-bounds reads during boot-time filesystem parsing, potentially redirecting reads to arbitrary disk offsets.

Affected products

• Pengutronix Barebox: before 2026.04.0 (fixed in 2026.04.0)

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