{"schema":"threatline.record/2","record":{"id":"CVE-2026-98769","aliases":[],"summary":"usb: gadget: f_uac1_legacy: validate bRequest index in generic_{set,get}_cmd","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_uac1_legacy: validate bRequest index in generic_{set,get}_cmd\n\ngeneric_set_cmd() and generic_get_cmd() use the low nibble of\nctrl->bRequest as an index into con->data[]:\n\n    u8 cmd = (ctrl->bRequest & 0x0F);  /* 0 .. 15 */\n    ...\n    con->data[cmd] = value;            /* OOB when cmd >= 5 */\n\nstruct usb_audio_control (include/linux/usb/audio.h) declares data as\na 5-element array, so indices 5 through 15 write (or read) up to 44\nbytes past the end of the array on the heap.\n\nA malicious USB host can craft a class-specific SET_CUR / GET_CUR\nrequest with an arbitrary bRequest value, triggering the out-of-bounds\naccess from an IRQ completion handler with no further preconditions.\n\nAdd an ARRAY_SIZE() guard to both functions.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98769","source_modified_at":"2026-10-21T12:56:44.141Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"c47d7b09891abb4f8b222317c89c7469bed8db3a","lessThan":"da841c1511a6160b8bc6bb7b7c6d4c9fb76fb51e","status":"affected","versionType":"git"},{"version":"c47d7b09891abb4f8b222317c89c7469bed8db3a","lessThan":"36f3f009049bc91e14dc856007932473318d12f8","status":"affected","versionType":"git"},{"version":"c47d7b09891abb4f8b222317c89c7469bed8db3a","lessThan":"8c611876c002d712ae5f246af5188432c708f79d","status":"affected","versionType":"git"},{"version":"c47d7b09891abb4f8b222317c89c7469bed8db3a","lessThan":"697cfe6e53b66cda196d6f8833b0ee97fefd0a8a","status":"affected","versionType":"git"},{"version":"c47d7b09891abb4f8b222317c89c7469bed8db3a","lessThan":"9062d50e75c24dc7911be05c9b1719b3b256af15","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98769","source_modified_at":"2026-10-21T12:56:44.141Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"2.6.31","status":"affected"},{"version":"0","lessThan":"2.6.31","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.56","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.10","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-2026-98769","source_modified_at":"2026-10-21T12:56:44.141Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"36f3f009049bc91e14dc856007932473318d12f8","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98769","source_modified_at":"2026-10-21T12:56:44.141Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8c611876c002d712ae5f246af5188432c708f79d","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98769","source_modified_at":"2026-10-21T12:56:44.141Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"697cfe6e53b66cda196d6f8833b0ee97fefd0a8a","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98769","source_modified_at":"2026-10-21T12:56:44.141Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9062d50e75c24dc7911be05c9b1719b3b256af15","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.05728,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:48:04.800Z","modified_at":"2026-10-21T12:56:44.141Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98769","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:56:44.141Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98769","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/da841c1511a6160b8bc6bb7b7c6d4c9fb76fb51e"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/36f3f009049bc91e14dc856007932473318d12f8"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8c611876c002d712ae5f246af5188432c708f79d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/697cfe6e53b66cda196d6f8833b0ee97fefd0a8a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/9062d50e75c24dc7911be05c9b1719b3b256af15"}],"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":"2026-10-21T12:56:44.141Z","content_hash":"9793f4914603cc41fcc18ed0cc73760e0529008ed40ec3ab5942f548acb87b39"}}