{"id":"CVE-2026-31701","state":"PUBLISHED","title":"ALSA: caiaq: take a reference on the USB device in create_card()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: caiaq: take a reference on the USB device in create_card()\n\nThe caiaq driver stores a pointer to the parent USB device in\ncdev->chip.dev but never takes a reference on it. The card's\nprivate_free callback, snd_usb_caiaq_card_free(), can run\nasynchronously via snd_card_free_when_closed() after the USB\ndevice has already been disconnected and freed, so any access to\ncdev->chip.dev in that path dereferences a freed usb_device.\n\nOn top of the refcounting issue, the current card_free implementation\ncalls usb_reset_device(cdev->chip.dev). A reset in a free callback\nis inappropriate: the device is going away, the call takes the\ndevice lock in a teardown context, and the reset races with the\ndisconnect path that the callback is already cleaning up after.\n\nTake a reference on the USB device in create_card() with\nusb_get_dev(), drop it with usb_put_dev() in the free callback,\nand remove the usb_reset_device() call.","publishedAt":"2026-05-01T13:56:00.869Z","updatedAt":"2026-06-14T17:43:40.642Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4dd821dcbfcecf7af6a08370b0b217cde2818acf","status":"affected","lessThan":"493b3a682ededc804555755f5d2193201339612d","versionType":"git"},{"version":"cadf1d8e9ddcd74584ec961aeac14ac549b261d8","status":"affected","lessThan":"dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e","versionType":"git"},{"version":"237f3faf0177bdde728fa3106d730d806436aa4d","status":"affected","lessThan":"ac7345f68cda6989016d85d63f7b244c064aa8f6","versionType":"git"},{"version":"4507a8b9b30344c5ddd8219945f446d47e966a6d","status":"affected","lessThan":"f6634af5de728a46792f674a66d7843570cb68f7","versionType":"git"},{"version":"a3f9314752dbb6f6aa1f0f2b4c58243bda800738","status":"affected","lessThan":"1d9be95aee6c6246a21752e60c9519902649f482","versionType":"git"},{"version":"b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c","status":"affected","lessThan":"6473ed16df1fe88051140611b3eb9a49be7f429e","versionType":"git"},{"version":"b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c","status":"affected","lessThan":"59b622a043cffc58b7638cd85ae6c30a0904f8e6","versionType":"git"},{"version":"b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c","status":"affected","lessThan":"80bb50e2d459213cccff3111d5ef98ed4238c0d5","versionType":"git"},{"version":"3993edf44d3df7b6e8c753eac6ac8783473fcbab","status":"affected","versionType":"git"},{"version":"ebad462eec93b0f701dfe4de98990e7355283801","status":"affected","versionType":"git"},{"version":"dd0de8cb708951cebf727aa045e8242ba651bb52","status":"affected","versionType":"git"},{"version":"5.10.231","status":"affected","lessThan":"5.10.258","versionType":"semver"},{"version":"5.15.174","status":"affected","lessThan":"5.15.209","versionType":"semver"},{"version":"6.1.120","status":"affected","lessThan":"6.1.175","versionType":"semver"},{"version":"6.6.64","status":"affected","lessThan":"6.6.136","versionType":"semver"},{"version":"6.12.2","status":"affected","lessThan":"6.12.84","versionType":"semver"},{"version":"4.19.325","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.287","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"6.11.11","status":"affected","lessThan":"6.12","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/caiaq/device.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.84","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.25","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.2","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/caiaq/device.c"]}],"references":["https://git.kernel.org/stable/c/493b3a682ededc804555755f5d2193201339612d","https://git.kernel.org/stable/c/dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e","https://git.kernel.org/stable/c/ac7345f68cda6989016d85d63f7b244c064aa8f6","https://git.kernel.org/stable/c/f6634af5de728a46792f674a66d7843570cb68f7","https://git.kernel.org/stable/c/1d9be95aee6c6246a21752e60c9519902649f482","https://git.kernel.org/stable/c/6473ed16df1fe88051140611b3eb9a49be7f429e","https://git.kernel.org/stable/c/59b622a043cffc58b7638cd85ae6c30a0904f8e6","https://git.kernel.org/stable/c/80bb50e2d459213cccff3111d5ef98ed4238c0d5"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31701.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31701","state":"PUBLISHED","datePublished":"2026-05-01T13:56:00.869Z","dateUpdated":"2026-06-14T17:43:40.642Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.132Z"},"containers":{"cna":{"title":"ALSA: caiaq: take a reference on the USB device in create_card()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: caiaq: take a reference on the USB device in create_card()\n\nThe caiaq driver stores a pointer to the parent USB device in\ncdev->chip.dev but never takes a reference on it. The card's\nprivate_free callback, snd_usb_caiaq_card_free(), can run\nasynchronously via snd_card_free_when_closed() after the USB\ndevice has already been disconnected and freed, so any access to\ncdev->chip.dev in that path dereferences a freed usb_device.\n\nOn top of the refcounting issue, the current card_free implementation\ncalls usb_reset_device(cdev->chip.dev). A reset in a free callback\nis inappropriate: the device is going away, the call takes the\ndevice lock in a teardown context, and the reset races with the\ndisconnect path that the callback is already cleaning up after.\n\nTake a reference on the USB device in create_card() with\nusb_get_dev(), drop it with usb_put_dev() in the free callback,\nand remove the usb_reset_device() call."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4dd821dcbfcecf7af6a08370b0b217cde2818acf","status":"affected","lessThan":"493b3a682ededc804555755f5d2193201339612d","versionType":"git"},{"version":"cadf1d8e9ddcd74584ec961aeac14ac549b261d8","status":"affected","lessThan":"dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e","versionType":"git"},{"version":"237f3faf0177bdde728fa3106d730d806436aa4d","status":"affected","lessThan":"ac7345f68cda6989016d85d63f7b244c064aa8f6","versionType":"git"},{"version":"4507a8b9b30344c5ddd8219945f446d47e966a6d","status":"affected","lessThan":"f6634af5de728a46792f674a66d7843570cb68f7","versionType":"git"},{"version":"a3f9314752dbb6f6aa1f0f2b4c58243bda800738","status":"affected","lessThan":"1d9be95aee6c6246a21752e60c9519902649f482","versionType":"git"},{"version":"b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c","status":"affected","lessThan":"6473ed16df1fe88051140611b3eb9a49be7f429e","versionType":"git"},{"version":"b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c","status":"affected","lessThan":"59b622a043cffc58b7638cd85ae6c30a0904f8e6","versionType":"git"},{"version":"b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c","status":"affected","lessThan":"80bb50e2d459213cccff3111d5ef98ed4238c0d5","versionType":"git"},{"version":"3993edf44d3df7b6e8c753eac6ac8783473fcbab","status":"affected","versionType":"git"},{"version":"ebad462eec93b0f701dfe4de98990e7355283801","status":"affected","versionType":"git"},{"version":"dd0de8cb708951cebf727aa045e8242ba651bb52","status":"affected","versionType":"git"},{"version":"5.10.231","status":"affected","lessThan":"5.10.258","versionType":"semver"},{"version":"5.15.174","status":"affected","lessThan":"5.15.209","versionType":"semver"},{"version":"6.1.120","status":"affected","lessThan":"6.1.175","versionType":"semver"},{"version":"6.6.64","status":"affected","lessThan":"6.6.136","versionType":"semver"},{"version":"6.12.2","status":"affected","lessThan":"6.12.84","versionType":"semver"},{"version":"4.19.325","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.287","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"6.11.11","status":"affected","lessThan":"6.12","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/caiaq/device.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.84","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.25","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.2","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/caiaq/device.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/493b3a682ededc804555755f5d2193201339612d"},{"url":"https://git.kernel.org/stable/c/dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e"},{"url":"https://git.kernel.org/stable/c/ac7345f68cda6989016d85d63f7b244c064aa8f6"},{"url":"https://git.kernel.org/stable/c/f6634af5de728a46792f674a66d7843570cb68f7"},{"url":"https://git.kernel.org/stable/c/1d9be95aee6c6246a21752e60c9519902649f482"},{"url":"https://git.kernel.org/stable/c/6473ed16df1fe88051140611b3eb9a49be7f429e"},{"url":"https://git.kernel.org/stable/c/59b622a043cffc58b7638cd85ae6c30a0904f8e6"},{"url":"https://git.kernel.org/stable/c/80bb50e2d459213cccff3111d5ef98ed4238c0d5"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:43:40.642Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.231","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.174","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.120","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.64","versionEndExcluding":"6.6.136"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIn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