{"schema":"threatline.record/2","record":{"id":"CVE-2026-74221","aliases":[],"summary":"U-Boot before 2026.10-rc5 Buffer Overflow via NFS READLINK","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.","categories":["Unclassified"],"product":"u-boot","vendor":"u-boot","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-74221","source_modified_at":"2026-09-30T13:47:56.756Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"u-boot","vendor":"u-boot","versions":[{"version":"0","lessThan":"2026.10-rc5","status":"affected","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-74221","source_modified_at":"2026-09-30T13:47:56.756Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"u-boot","ecosystem":null},"version":"2026.10-rc5","basis":"first unaffected version stated in the CVE record"}],"cvss":8.8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00344,"percentile":0.26699,"score_date":"2026-10-23"},"published_at":"2026-09-29T21:29:23.283Z","modified_at":"2026-09-30T13:47:56.756Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-74221","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-30T13:47:56.756Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-74221","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/u-boot/u-boot/commit/1c0aff3a5fbfeee7a8948f624e0b8554e6e0d8fd","tags":["patch"]},{"source":"CVE List","url":"https://github.com/u-boot/u-boot/blob/v2026.07/net/nfs-common.c#L643","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/u-boot/u-boot","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc5-buffer-overflow-via-nfs-readlink","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-09-30T13:47:47.195363Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-30T13:47:56.756Z","content_hash":"e7fe7d22a725cdfb33540e67e7b533bb4150a790c665d592bb61f371c12e8942"}}