{"id":"CVE-2026-74221","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74221","summary":"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…","details":"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.","published":"2026-09-29T21:29:23.283Z","modified":"2026-09-29T21:29:23.283Z","cvss":{"score":8.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/u-boot/u-boot/commit/1c0aff3a5fbfeee7a8948f624e0b8554e6e0d8fd","label":"u-boot/u-boot@1c0aff3"},"references":[{"type":"FIX","url":"https://github.com/u-boot/u-boot/commit/1c0aff3a5fbfeee7a8948f624e0b8554e6e0d8fd"},{"type":"WEB","url":"https://github.com/u-boot/u-boot/blob/v2026.07/net/nfs-common.c#L643"},{"type":"WEB","url":"https://github.com/u-boot/u-boot"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc5-buffer-overflow-via-nfs-readlink"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-29T21:29:23.283Z"}}