CVE-2026-15390

EUVD-2026-88699
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9 CRITICAL
ADJACENT
LOW
NONE
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 9.29%
Debian logo
Debian Releases
Debian Product
Codename
u-boot
bookworm
vulnerable
bookworm (security)
vulnerable
forky
vulnerable
sid
vulnerable
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
u-boot
bionic
Fixed 2020.10+dfsg-1ubuntu0~18.04.3+esm1
released
focal
Fixed 2021.01+dfsg-3ubuntu0~20.04.6+esm1
released
jammy
Fixed 2022.01+dfsg-2ubuntu2.8
released
noble
Fixed 2025.10-0ubuntu0.24.04.3
released
resolute
Fixed 2025.10-0ubuntu2.1
released
xenial
Fixed 2016.01+dfsg1-2ubuntu5+esm1
released
u-boot-nezha
jammy
needs-triage
noble
needs-triage
resolute
dne
Common Weakness Enumeration
References
https://cert.pl/en/posts/2026/09/CVE-2026-15390
https://source.denx.de/u-boot/u-boot/-/commit/b1aec609bb5e0d08c25c888c91935287ab4ee5fa