{"schema":"threatline.record/2","record":{"id":"CVE-2026-93808","aliases":[],"summary":"ALSA: usb-audio: caiaq: validate EP1 reply lengths","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: caiaq: validate EP1 reply lengths\n\nusb_ep1_command_reply_dispatch() uses buf[0] as a command byte and then\nreads command-specific fixed items from the same URB buffer. Several\npaths use buf + 1, buf[1], buf[2], or buf + 3 without first proving that\nurb->actual_length contains those bytes.\n\nAdd per-command length checks, use a payload length derived from the\nbytes after the command byte for the control-state copy, and reject short\nanalog input payloads before the input helper reads fixed offsets from\nthe EP1 reply.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93808","source_modified_at":"2026-10-03T10:57:41.411Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Linux","vendor":"Linux","versions":[{"version":"523f1dce37434a9a6623bf46e7893e2b4b10ac3c","lessThan":"91acd231f219452fa58285239f83945accad9513","status":"affected","versionType":"git"},{"version":"523f1dce37434a9a6623bf46e7893e2b4b10ac3c","lessThan":"7cc6b3745a0cea697c8d0684b3094f220281a08d","status":"affected","versionType":"git"},{"version":"523f1dce37434a9a6623bf46e7893e2b4b10ac3c","lessThan":"add9328c91c195c494cd68a21b19e5e47a20d784","status":"affected","versionType":"git"},{"version":"523f1dce37434a9a6623bf46e7893e2b4b10ac3c","lessThan":"319393151367e6626affedcdd4f7b7b0286f4246","status":"affected","versionType":"git"},{"version":"523f1dce37434a9a6623bf46e7893e2b4b10ac3c","lessThan":"af8a172c4f71ac30d625f2966d2389a7fa872819","status":"affected","versionType":"git"},{"version":"523f1dce37434a9a6623bf46e7893e2b4b10ac3c","lessThan":"74f3c639f64fa5da4e1613149798b5089bce2807","status":"affected","versionType":"git"},{"version":"523f1dce37434a9a6623bf46e7893e2b4b10ac3c","lessThan":"aba30af07d4fe499b50209801eba9da8a815522f","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93808","source_modified_at":"2026-10-03T10:57:41.411Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Linux","vendor":"Linux","versions":[{"version":"2.6.22","status":"affected"},{"version":"0","lessThan":"2.6.22","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.111","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93808","source_modified_at":"2026-10-03T10:57:41.411Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Linux","ecosystem":null},"version":"91acd231f219452fa58285239f83945accad9513","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93808","source_modified_at":"2026-10-03T10:57:41.411Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Linux","ecosystem":null},"version":"7cc6b3745a0cea697c8d0684b3094f220281a08d","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93808","source_modified_at":"2026-10-03T10:57:41.411Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Linux","ecosystem":null},"version":"319393151367e6626affedcdd4f7b7b0286f4246","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93808","source_modified_at":"2026-10-03T10:57:41.411Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Linux","ecosystem":null},"version":"74f3c639f64fa5da4e1613149798b5089bce2807","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00173,"percentile":0.06355,"score_date":"2026-10-23"},"published_at":"2026-09-24T16:02:43.621Z","modified_at":"2026-10-03T10:57:41.411Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-93808","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-03T10:57:41.411Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-93808","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/91acd231f219452fa58285239f83945accad9513"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/7cc6b3745a0cea697c8d0684b3094f220281a08d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/add9328c91c195c494cd68a21b19e5e47a20d784"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/319393151367e6626affedcdd4f7b7b0286f4246"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/af8a172c4f71ac30d625f2966d2389a7fa872819"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/74f3c639f64fa5da4e1613149798b5089bce2807"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/aba30af07d4fe499b50209801eba9da8a815522f"}],"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":"2026-10-03T10:57:41.411Z","content_hash":"341c09473e775a58c1babb83074bb69a89c13a1fc66246168414818870fb4fc7"}}