{"id":"CVE-2026-31701","summary":"ALSA: caiaq: take a reference on the USB device in create_card()","details":"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-\u003echip.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-\u003echip.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-\u003echip.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.","modified":"2026-10-28T02:30:50.718657894Z","published":"2026-05-01T13:56:00.869Z","related":["SUSE-SU-2026:23066-1","SUSE-SU-2026:23068-1","SUSE-SU-2026:23193-1","SUSE-SU-2026:23194-1","SUSE-SU-2026:23221-1","SUSE-SU-2026:23231-1","SUSE-SU-2026:23237-1","SUSE-SU-2026:23241-1","SUSE-SU-2026:23244-1","SUSE-SU-2026:3130-1","SUSE-SU-2026:3166-1","openSUSE-SU-2026:10793-1","openSUSE-SU-2026:21555-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31701.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1d9be95aee6c6246a21752e60c9519902649f482"},{"type":"WEB","url":"https://git.kernel.org/stable/c/493b3a682ededc804555755f5d2193201339612d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/59b622a043cffc58b7638cd85ae6c30a0904f8e6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6473ed16df1fe88051140611b3eb9a49be7f429e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/80bb50e2d459213cccff3111d5ef98ed4238c0d5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ac7345f68cda6989016d85d63f7b244c064aa8f6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f6634af5de728a46792f674a66d7843570cb68f7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31701.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31701"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4dd821dcbfcecf7af6a08370b0b217cde2818acf"},{"fixed":"493b3a682ededc804555755f5d2193201339612d"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cadf1d8e9ddcd74584ec961aeac14ac549b261d8"},{"fixed":"dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"237f3faf0177bdde728fa3106d730d806436aa4d"},{"fixed":"ac7345f68cda6989016d85d63f7b244c064aa8f6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4507a8b9b30344c5ddd8219945f446d47e966a6d"},{"fixed":"f6634af5de728a46792f674a66d7843570cb68f7"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a3f9314752dbb6f6aa1f0f2b4c58243bda800738"},{"fixed":"1d9be95aee6c6246a21752e60c9519902649f482"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c"},{"fixed":"6473ed16df1fe88051140611b3eb9a49be7f429e"},{"fixed":"59b622a043cffc58b7638cd85ae6c30a0904f8e6"},{"fixed":"80bb50e2d459213cccff3111d5ef98ed4238c0d5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.10.231"},{"fixed":"5.10.258"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.174"},{"fixed":"5.15.209"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.1.120"},{"fixed":"6.1.175"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.6.64"},{"fixed":"6.6.136"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.12.2"},{"fixed":"6.12.84"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.19.325"},{"fixed":"4.20"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.4.287"},{"fixed":"5.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.11.11"},{"fixed":"6.12"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3993edf44d3df7b6e8c753eac6ac8783473fcbab"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ebad462eec93b0f701dfe4de98990e7355283801"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"dd0de8cb708951cebf727aa045e8242ba651bb52"}]}],"versions":["v5.10.257","v5.10.256","v5.10.255","v5.10.254","v5.10.253","v5.10.252","v5.10.251","v5.10.250","v5.10.249","v5.10.248","v5.10.247","v5.10.246","v5.10.245","v5.10.244","v5.10.243","v5.10.242","v5.10.241","v5.10.240","v5.10.239","v5.10.238","v5.10.237","v5.10.236","v5.10.235","v5.10.234","v5.10.233","v5.10.232","v5.10.231","v5.15.208","v5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