CVE-2026-74221

Name	CVE-2026-74221
Description	U-Boot before 2026.10-rc5 contains a buffer overflow in nfs_readlink_reply() function in net/nfs-common.c when processing NFS server responses. A malicious NFS server can send crafted READLINK replies with negative or oversized symlink length values to corrupt memory and crash the bootloader.
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)

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	vulnerable
	trixie	2025.01-3+deb13u1	vulnerable
	forky, sid	2025.01-3.2	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
u-boot	source	(unstable)	(unfixed)

Notes

Introduced with: https://github.com/u-boot/u-boot/commit/cf3a4f1e86ecdd24f87b615051b49d8e1968c230 (v2019.10-rc4)
Fixed by: https://github.com/u-boot/u-boot/commit/1c0aff3a5fbfeee7a8948f624e0b8554e6e0d8fd (v2026.10-rc5)