Paper/Archive/CVE-2026-15390

CVE-2026-15390

DENX Software Engineering Das U-Boot — Out-of-bounds write in Das U-Boot

CVSS 9.0 (CNA)9.0 / 10 × 3027.0 Not in CISA KEV+300.0 EPSS percentile 9.2.092 × 201.8 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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

ProductAffectedFixed inSource

Das U-Boot2009.08 – 2026.07–CNA

Scores by source

CERT-PL (CNA)9.0CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

writeupcert.pl/en/posts/2026/09/CVE-2026-15390 patchsource.denx.de/u-boot/u-boot/-/commit/b1aec609bb5e0d08c25c888c91935287ab4ee5fa