CVE-2026-15390

Critical

Description

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.

SeverityCritical

CVSS9.0

Exploit probability—

ProductDas U-Boot

PublishedSep 29, 2026

First seenSep 29, 2026

Weakness typeCWE-787Out-of-bounds write CWE-459CWE-459

How to fix

Patches

source.denx.de/u-boot/u-boot/-/commit/b1aec609bb5e0d08c25c888c91935287ab4ee5fa

Affected products

Product	Affected versions	Fixed in
DENX Software Engineering Das U-Boot	2009.08 ≤ v ≤ 2026.07	—

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