CVE-2026-15390: Denx Software Engineering Das U-Boot

Critical severity, CVSS 9.0. EPSS: 0.3% chance of exploitation in the next 30 days.

Das U-Boot with CONFIG_IP_DEFRAG=y parameter fails to clear IP reassembly state after delivering a complete datagram. An attacker who can deliver fragmented IP traffic can execute arbitrary code by sending duplicated last-fragment IP packets. This issue was fixed in commit b1aec609bb5e0d08c25c888c91935287ab4ee5fa in version 2026.07.

Affected products

• Denx Software Engineering Das U-Boot: from 2009.08, up to and including 2026.07

Published 2026-09-29. Last modified 2026-09-30.