{"api_version":"1","generated_at":"2026-10-26T06:23:51+00:00","cve":"CVE-2026-98837","urls":{"html":"https://cve.report/CVE-2026-98837","api":"https://cve.report/api/cve/CVE-2026-98837.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98837","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98837"},"summary":{"title":"ALSA: caiaq: unregister the input device when probe fails","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:37","updated_at":"2026-10-21 13:21:48"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/0b7bd20f6379bc5e431fd74d866390f5b5b63f3c","name":"https://git.kernel.org/stable/c/0b7bd20f6379bc5e431fd74d866390f5b5b63f3c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/84727facd8506140cd04f2b0a8b1c4ddeac41cea","name":"https://git.kernel.org/stable/c/84727facd8506140cd04f2b0a8b1c4ddeac41cea","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/df2787819bd137111b56b8631dd581b0cce7144d","name":"https://git.kernel.org/stable/c/df2787819bd137111b56b8631dd581b0cce7144d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/850810c12686f80cdf7530f4f21e0157d904f739","name":"https://git.kernel.org/stable/c/850810c12686f80cdf7530f4f21e0157d904f739","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2e5a413cc2a489c9427ecd3d73ad764bfb0c7103","name":"https://git.kernel.org/stable/c/2e5a413cc2a489c9427ecd3d73ad764bfb0c7103","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98837","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98837","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f537e3ad69609f6924a4db6b4a7f6561f5288bdd df2787819bd137111b56b8631dd581b0cce7144d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6251e3e256337a30160ef59ab1580dde4d1acd28 850810c12686f80cdf7530f4f21e0157d904f739 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056 84727facd8506140cd04f2b0a8b1c4ddeac41cea git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 28abd224db4a49560b452115bca3672a20e45b2f 2e5a413cc2a489c9427ecd3d73ad764bfb0c7103 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 28abd224db4a49560b452115bca3672a20e45b2f 0b7bd20f6379bc5e431fd74d866390f5b5b63f3c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected da938aa9fc7826901921dcea225948ab21a97e45 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 09616e25f502080ba684fc7fcf959d1376ab756d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b956e48371f2ff72b76be9a829800ecec963bd45 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 096dd8519cf2f768e9e14f224b627f7aaee1a9c5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.140 6.6.160 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.86 6.12.113 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18.27 6.18.56 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.10.258 5.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15.209 5.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.175 6.2 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.0.4 7.1 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.1","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.160 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.113 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.56 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.10 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"98837","cve":"CVE-2026-98837","epss":"0.002000000","percentile":"0.092930000","score_date":"2026-10-21","updated_at":"2026-10-22 00:15:10"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["sound/usb/caiaq/device.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"df2787819bd137111b56b8631dd581b0cce7144d","status":"affected","version":"f537e3ad69609f6924a4db6b4a7f6561f5288bdd","versionType":"git"},{"lessThan":"850810c12686f80cdf7530f4f21e0157d904f739","status":"affected","version":"6251e3e256337a30160ef59ab1580dde4d1acd28","versionType":"git"},{"lessThan":"84727facd8506140cd04f2b0a8b1c4ddeac41cea","status":"affected","version":"e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056","versionType":"git"},{"lessThan":"2e5a413cc2a489c9427ecd3d73ad764bfb0c7103","status":"affected","version":"28abd224db4a49560b452115bca3672a20e45b2f","versionType":"git"},{"lessThan":"0b7bd20f6379bc5e431fd74d866390f5b5b63f3c","status":"affected","version":"28abd224db4a49560b452115bca3672a20e45b2f","versionType":"git"},{"status":"affected","version":"da938aa9fc7826901921dcea225948ab21a97e45","versionType":"git"},{"status":"affected","version":"09616e25f502080ba684fc7fcf959d1376ab756d","versionType":"git"},{"status":"affected","version":"b956e48371f2ff72b76be9a829800ecec963bd45","versionType":"git"},{"status":"affected","version":"096dd8519cf2f768e9e14f224b627f7aaee1a9c5","versionType":"git"},{"lessThan":"6.6.160","status":"affected","version":"6.6.140","versionType":"semver"},{"lessThan":"6.12.113","status":"affected","version":"6.12.86","versionType":"semver"},{"lessThan":"6.18.56","status":"affected","version":"6.18.27","versionType":"semver"},{"lessThan":"5.11","status":"affected","version":"5.10.258","versionType":"semver"},{"lessThan":"5.16","status":"affected","version":"5.15.209","versionType":"semver"},{"lessThan":"6.2","status":"affected","version":"6.1.175","versionType":"semver"},{"lessThan":"7.1","status":"affected","version":"7.0.4","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["sound/usb/caiaq/device.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"7.1"},{"lessThan":"7.1","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.160","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.113","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.56","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.160","versionStartIncluding":"6.6.140","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.113","versionStartIncluding":"6.12.86","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.56","versionStartIncluding":"6.18.27","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.10","versionStartIncluding":"7.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"7.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.258","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.209","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.175","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-10-21T12:57:23.170Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/df2787819bd137111b56b8631dd581b0cce7144d"},{"url":"https://git.kernel.org/stable/c/850810c12686f80cdf7530f4f21e0157d904f739"},{"url":"https://git.kernel.org/stable/c/84727facd8506140cd04f2b0a8b1c4ddeac41cea"},{"url":"https://git.kernel.org/stable/c/2e5a413cc2a489c9427ecd3d73ad764bfb0c7103"},{"url":"https://git.kernel.org/stable/c/0b7bd20f6379bc5e431fd74d866390f5b5b63f3c"}],"title":"ALSA: caiaq: unregister the input device when probe fails","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98837","datePublished":"2026-10-18T15:50:05.338Z","dateReserved":"2026-09-25T10:25:14.372Z","dateUpdated":"2026-10-21T12:57:23.170Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:37","lastModifiedDate":"2026-10-21 13:21:48","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98837","Ordinal":"1","Title":"ALSA: caiaq: unregister the input device when probe fails","CVE":"CVE-2026-98837","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98837","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ALSA: caiaq: unregister the input device when probe fails"}]}}}