{"schema":"threatline.record/2","record":{"id":"CVE-2026-98600","aliases":[],"summary":"Bluetooth: RFCOMM: Reject short EA=0 frames in rfcomm_recv_frame()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: RFCOMM: Reject short EA=0 frames in rfcomm_recv_frame()\n\nWhile rfcomm_recv_frame() verifies that skb->len is at least\nsizeof(*hdr) + 1 (4 bytes: 3-byte header + 1-byte FCS), an RFCOMM frame\nwith an extended 2-byte length field (!__test_ea(hdr->len)) has a 4-byte\nheader plus a 1-byte FCS (5 bytes minimum, sizeof(*hdr) + 2).\n\nWhen a 4-byte RFCOMM frame with EA == 0 arrives:\n1. The initial skb->len < sizeof(*hdr) + 1 check passes (4 < 4 is false).\n2. Trimming the FCS byte decrements skb->len to 3.\n3. If __check_fcs() succeeds, skb_pull(skb, 4) fails (4 > 3) and returns\n   NULL without advancing skb->data.\n4. Because the return value of skb_pull() is ignored, the un-pulled\n   3-byte struct rfcomm_hdr remains at skb->data and is either queued as\n   application payload via rfcomm_recv_data() or parsed as a multiplexer\n   control command via rfcomm_recv_mcc() on DLCI 0.\n\nFix this by extending the length check in rfcomm_recv_frame() to also\nrequire skb->len >= sizeof(*hdr) + 2 when !__test_ea(hdr->len).","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98600","source_modified_at":"2026-10-19T09:22:26.711Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"fb40eda15122f6b780228639c1ead6820340ff54","lessThan":"76876fd26569302d26d91cbe8b75fa8e66cf8969","status":"affected","versionType":"git"},{"version":"3829af5fab5a22405bf1e7d69068c2ec0fce46ca","lessThan":"97711b964877242933484989224a3c4c5d88a5ee","status":"affected","versionType":"git"},{"version":"b161eacd7fa4a2d765724b5504ac6cc388e48f80","lessThan":"7a1781a2f3a9667b3065d402d1f11986a2363e08","status":"affected","versionType":"git"},{"version":"30d1d9f3495463f7c026e4c553127f79b486fcd6","lessThan":"c25587fa26761e623198b4f47151fe79d09ccde6","status":"affected","versionType":"git"},{"version":"67dc3b40fae71b6b11c71e7ff69bac0758818c05","lessThan":"71ccacde407b7d8f0ef48974a0d2524602fd5c44","status":"affected","versionType":"git"},{"version":"bbc310caa2b6bf5fe42896ba27da0fbc12e4ac51","lessThan":"be00deee60044ffa820f9436415caeb665b2cda0","status":"affected","versionType":"git"},{"version":"b230e5bf501c5edaf2eb0991cb862ac142031d4b","lessThan":"9240fc1f2cde5331c61608da21b00394602ca762","status":"affected","versionType":"git"},{"version":"b230e5bf501c5edaf2eb0991cb862ac142031d4b","lessThan":"6d91041bb38b97e2feb625123cc0529d7b83a0e1","status":"affected","versionType":"git"},{"version":"6.12.111","lessThan":"6.12.112","status":"affected","versionType":"semver"},{"version":"6.18.53","lessThan":"6.18.55","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98600","source_modified_at":"2026-10-19T09:22:26.711Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"7.2","status":"affected"},{"version":"0","lessThan":"7.2","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.55","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.9","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98600","source_modified_at":"2026-10-19T09:22:26.711Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"76876fd26569302d26d91cbe8b75fa8e66cf8969","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98600","source_modified_at":"2026-10-19T09:22:26.711Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"97711b964877242933484989224a3c4c5d88a5ee","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98600","source_modified_at":"2026-10-19T09:22:26.711Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"7a1781a2f3a9667b3065d402d1f11986a2363e08","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98600","source_modified_at":"2026-10-19T09:22:26.711Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"71ccacde407b7d8f0ef48974a0d2524602fd5c44","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98600","source_modified_at":"2026-10-19T09:22:26.711Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9240fc1f2cde5331c61608da21b00394602ca762","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98600","source_modified_at":"2026-10-19T09:22:26.711Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6d91041bb38b97e2feb625123cc0529d7b83a0e1","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98600","source_modified_at":"2026-10-19T09:22:26.711Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6.12.112","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98600","source_modified_at":"2026-10-19T09:22:26.711Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6.18.55","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00176,"percentile":0.06838,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:19:12.864Z","modified_at":"2026-10-19T09:22:26.711Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98600","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:22:26.711Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98600","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/76876fd26569302d26d91cbe8b75fa8e66cf8969"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/97711b964877242933484989224a3c4c5d88a5ee"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/7a1781a2f3a9667b3065d402d1f11986a2363e08"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c25587fa26761e623198b4f47151fe79d09ccde6"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/71ccacde407b7d8f0ef48974a0d2524602fd5c44"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/be00deee60044ffa820f9436415caeb665b2cda0"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/9240fc1f2cde5331c61608da21b00394602ca762"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/6d91041bb38b97e2feb625123cc0529d7b83a0e1"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:22:26.711Z","content_hash":"71d367bf6be23047d8a3856368d3dbb30c3befe842bef221f729a133de83f80f"}}