| 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) |
| Debian Bugs | 1149671 |
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 | experimental | 2026.10~rc5-1 | | | |
| u-boot | source | (unstable) | (unfixed) | | | 1149671 |
Notes
[trixie] - u-boot <no-dsa> (Minor issue)
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)