{"id":"CVE-2026-80815","summary":"ALSA: scarlett2: Use a private URB for the notification endpoint","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: scarlett2: Use a private URB for the notification endpoint\n\nscarlett2_init_notify() used mixer-\u003eurb, which\nsnd_usb_mixer_status_create() allocates for the UAC2 status interrupt\nendpoint and mixer.c manages. On a device with that endpoint, the\n\"already in use\" check fires on the status URB and returns 0 for\nsuccess without doing anything. No notification URB is submitted, and\ncmd_done is left zeroed because it is initialised past that check and\nnowhere else. scarlett2_usb_init() then issues SCARLETT2_USB_INIT_1\nand wait_for_completion_timeout() would crash adding to the zeroed\nwait.head.\n\nUse a separate URB in scarlett2_data, as done for FCP, and initialise\ncmd_done in scarlett2_init_private(). mixer.c was also freeing the URB\nin snd_usb_mixer_free() and resubmitting it in\nsnd_usb_mixer_activate(), so scarlett2 must now do both: add\nscarlett2_cleanup_urb(), called from private_free and private_suspend,\nand a private_resume callback to re-establish the URB after resume.\nscarlett2_init_notify() is reached from there, and the URB kill path\nin scarlett2_notify() completes cmd_done, leaving a stale count that\nwould satisfy the next command's wait before the device ACKs. Use\nreinit_completion() to clear it.\n\nAlso free the URB if the transfer buffer allocation fails, and both if\nusb_submit_urb() fails. Move scarlett2_init_notify() up next to\nscarlett2_cleanup_urb() so scarlett2_init_private() can reference it\nwithout a forward declaration.","modified":"2026-09-06T03:46:39.237496910Z","published":"2026-09-04T15:13:35.740Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80815.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/013448eb7b0d0b91d6168685dab10e9b41baa825"},{"type":"WEB","url":"https://git.kernel.org/stable/c/04df0232a6976845cd9c9e83b6c26215759be667"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4305e4b52acc0ca67dcfdf8f73dd943dab508ae8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cd17d6ff7b7d2b1dd9bcc80ae7b4a83773f918c6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ecd2f83a4ddc078901e7104144cb6c5e5db3b7cf"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80815.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80815"},{"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":"1b65088958cadab04d5d34a8615e2466b1b48ecb"},{"fixed":"013448eb7b0d0b91d6168685dab10e9b41baa825"},{"fixed":"4305e4b52acc0ca67dcfdf8f73dd943dab508ae8"},{"fixed":"04df0232a6976845cd9c9e83b6c26215759be667"},{"fixed":"ecd2f83a4ddc078901e7104144cb6c5e5db3b7cf"},{"fixed":"cd17d6ff7b7d2b1dd9bcc80ae7b4a83773f918c6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80815.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.10.0"},{"fixed":"6.12.106"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.47"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.11"}]},{"type":"ECOSYSTEM","events":[{"introduced":"7.2.0"},{"fixed":"7.2.1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80815.json"}}],"schema_version":"1.9.0"}