{"id":"CVE-2026-74221","revision":"31e3f16321cc4ecf8fa3da1990f1f181","records":[{"revision":"31e3f16321cc4ecf8fa3da1990f1f181","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74221","aliases":[],"title":"U-Boot before 2026.10-rc5 Buffer Overflow via NFS READLINK","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.","state":0,"publishedAt":"2026-09-29T21:29:23.283+00:00","modifiedAt":"2026-09-30T13:47:56.756+00:00","affected":[{"ecosystem":"Vendor product","name":"u-boot","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"u-boot\",\n                    \"product\": \"u-boot\",\n                    \"repo\": \"https://github.com/u-boot/u-boot\",\n                    \"packageURL\": \"pkg:github/u-boot/u-boot\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2026.10-rc5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","score":8.8,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","score":8.2,"severity":"HIGH"}],"references":["https://github.com/u-boot/u-boot/commit/1c0aff3a5fbfeee7a8948f624e0b8554e6e0d8fd","https://github.com/u-boot/u-boot/blob/v2026.07/net/nfs-common.c#L643","https://github.com/u-boot/u-boot","https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc5-buffer-overflow-via-nfs-readlink"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74221","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74221","identifiers":["CVE-2026-74221"]},"retained":false,"historicalAffected":[]}],"coverage":[]}