{"id":"CVE-2026-74221","published":"2026-09-29T22:18:33.493","lastModified":"2026-09-29T22:18:33.493","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.","cvssScore":8.2,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","cwes":["CWE-195"],"vendors":[],"products":[],"references":[{"url":"https://github.com/u-boot/u-boot","tags":[]},{"url":"https://github.com/u-boot/u-boot/blob/v2026.07/net/nfs-common.c#L643","tags":[]},{"url":"https://github.com/u-boot/u-boot/commit/1c0aff3a5fbfeee7a8948f624e0b8554e6e0d8fd","tags":[]},{"url":"https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc5-buffer-overflow-via-nfs-readlink","tags":[]}],"exploitRefs":[{"url":"https://github.com/u-boot/u-boot","tags":[]},{"url":"https://github.com/u-boot/u-boot/blob/v2026.07/net/nfs-common.c#L643","tags":[]},{"url":"https://github.com/u-boot/u-boot/commit/1c0aff3a5fbfeee7a8948f624e0b8554e6e0d8fd","tags":[]}],"hasPoc":true,"ai":null}