CVE-2024-42040

Name	CVE-2024-42040
Description	Buffer Overflow vulnerability in the net/bootp.c in DENEX U-Boot from its initial commit in 2002 (3861aa5) up to today on any platform allows an attacker on the local network to leak memory from four up to 32 bytes of memory stored behind the packet to the network depending on the later use of DHCP-provided parameters via crafted DHCP responses.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4642-1
Debian Bugs	1081557

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
u-boot (PTS)	bookworm, bookworm (security)	2023.01+dfsg-2+deb12u3	fixed
	trixie	2025.01-3+deb13u1	fixed
	forky, sid	2025.01-3.2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
u-boot	source	bullseye	2021.01+dfsg-5+deb11u3	DLA-4642-1
u-boot	source	bookworm	2023.01+dfsg-2+deb12u3	DLA-4642-1
u-boot	source	trixie	2025.01-3+deb13u1
u-boot	source	(unstable)	2025.01-3.2		1081557

Notes

https://lists.denx.de/pipermail/u-boot/2024-August/562528.html
https://www.schutzwerk.com/advisories/SCHUTZWERK-SA-2024-004.txt
Fixed by: https://github.com/u-boot/u-boot/commit/81e5708cc2c865df606e49aed5415adb2a662171 (v2026.01-rc1)