{"schema":"threatline.record/2","record":{"id":"CVE-2026-98837","aliases":[],"summary":"ALSA: caiaq: unregister the input device when probe fails","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: caiaq: unregister the input device when probe fails\n\nsetup_card() registers the input device, whose name and phys point into\nstruct snd_usb_caiaqdev, and then goes on to snd_card_register() and\nsnd_usb_caiaq_control_init(). If either fails, snd_probe() calls\nsnd_card_free(), which frees the device state but leaves the input\ndevice registered: card_free() only clears the pointer, and the input\ndevice is unregistered from snd_disconnect() alone. Reading its \"uevent\"\nattribute afterwards dereferences freed memory:\n\n  BUG: KASAN: slab-use-after-free in string+0x4a9/0x4f0\n  Read of size 1 at addr ffff8880208f5043 by task caiaq/4967\n   add_uevent_var+0x183/0x3a0\n   input_dev_uevent+0x162/0x900\n   dev_uevent+0x2f1/0x870\n   uevent_show+0x1ca/0x3a0\n   ...\n\nUnregister the input device on the probe error path, as\nsnd_disconnect() does. snd_usb_caiaq_input_disconnect() is a no-op when\nno input device was registered.\n\nReproduced with a raw-gadget Audio Kontrol 1 and a temporary hack that\nmakes snd_usb_caiaq_control_init() fail.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98837","source_modified_at":"2026-10-21T12:57:23.170Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"f537e3ad69609f6924a4db6b4a7f6561f5288bdd","lessThan":"df2787819bd137111b56b8631dd581b0cce7144d","status":"affected","versionType":"git"},{"version":"6251e3e256337a30160ef59ab1580dde4d1acd28","lessThan":"850810c12686f80cdf7530f4f21e0157d904f739","status":"affected","versionType":"git"},{"version":"e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056","lessThan":"84727facd8506140cd04f2b0a8b1c4ddeac41cea","status":"affected","versionType":"git"},{"version":"28abd224db4a49560b452115bca3672a20e45b2f","lessThan":"2e5a413cc2a489c9427ecd3d73ad764bfb0c7103","status":"affected","versionType":"git"},{"version":"28abd224db4a49560b452115bca3672a20e45b2f","lessThan":"0b7bd20f6379bc5e431fd74d866390f5b5b63f3c","status":"affected","versionType":"git"},{"version":"da938aa9fc7826901921dcea225948ab21a97e45","status":"affected","versionType":"git"},{"version":"09616e25f502080ba684fc7fcf959d1376ab756d","status":"affected","versionType":"git"},{"version":"b956e48371f2ff72b76be9a829800ecec963bd45","status":"affected","versionType":"git"},{"version":"096dd8519cf2f768e9e14f224b627f7aaee1a9c5","status":"affected","versionType":"git"},{"version":"6.6.140","lessThan":"6.6.160","status":"affected","versionType":"semver"},{"version":"6.12.86","lessThan":"6.12.113","status":"affected","versionType":"semver"},{"version":"6.18.27","lessThan":"6.18.56","status":"affected","versionType":"semver"},{"version":"5.10.258","lessThan":"5.11","status":"affected","versionType":"semver"},{"version":"5.15.209","lessThan":"5.16","status":"affected","versionType":"semver"},{"version":"6.1.175","lessThan":"6.2","status":"affected","versionType":"semver"},{"version":"7.0.4","lessThan":"7.1","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98837","source_modified_at":"2026-10-21T12:57:23.170Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"7.1","status":"affected"},{"version":"0","lessThan":"7.1","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-2026-98837","source_modified_at":"2026-10-21T12:57:23.170Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"850810c12686f80cdf7530f4f21e0157d904f739","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98837","source_modified_at":"2026-10-21T12:57:23.170Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"84727facd8506140cd04f2b0a8b1c4ddeac41cea","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98837","source_modified_at":"2026-10-21T12:57:23.170Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"2e5a413cc2a489c9427ecd3d73ad764bfb0c7103","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98837","source_modified_at":"2026-10-21T12:57:23.170Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0b7bd20f6379bc5e431fd74d866390f5b5b63f3c","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98837","source_modified_at":"2026-10-21T12:57:23.170Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6.6.160","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98837","source_modified_at":"2026-10-21T12:57:23.170Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6.12.113","basis":"first unaffected version stated in the CVE record"},{"source":"CVE 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List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98837","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:57:23.170Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98837","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/df2787819bd137111b56b8631dd581b0cce7144d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/850810c12686f80cdf7530f4f21e0157d904f739"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/84727facd8506140cd04f2b0a8b1c4ddeac41cea"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/2e5a413cc2a489c9427ecd3d73ad764bfb0c7103"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0b7bd20f6379bc5e431fd74d866390f5b5b63f3c"}],"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":"2026-10-21T12:57:23.170Z","content_hash":"a9cb7a747394fec71f8f58259d77d41f0ac0c9f713f32c3cf770eae7be81d0cd"}}