{"id":"CVE-2026-31701","title":"ALSA: caiaq: take a reference on the USB device in create_card()","summary":"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 referen…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 4dd821dcbfcecf7af6a08370b0b217cde2818acf < 493b3a682ededc804555755f5d2193201339612d","Linux >= cadf1d8e9ddcd74584ec961aeac14ac549b261d8 < dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e","Linux >= 237f3faf0177bdde728fa3106d730d806436aa4d < ac7345f68cda6989016d85d63f7b244c064aa8f6","Linux >= 4507a8b9b30344c5ddd8219945f446d47e966a6d < f6634af5de728a46792f674a66d7843570cb68f7","Linux >= a3f9314752dbb6f6aa1f0f2b4c58243bda800738 < 1d9be95aee6c6246a21752e60c9519902649f482","Linux >= b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c < 6473ed16df1fe88051140611b3eb9a49be7f429e","Linux >= b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c < 59b622a043cffc58b7638cd85ae6c30a0904f8e6","Linux >= b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c < 80bb50e2d459213cccff3111d5ef98ed4238c0d5","Linux 3993edf44d3df7b6e8c753eac6ac8783473fcbab","Linux ebad462eec93b0f701dfe4de98990e7355283801","Linux dd0de8cb708951cebf727aa045e8242ba651bb52","Linux >= 5.10.231 < 5.10.258","Linux >= 5.15.174 < 5.15.209","Linux >= 6.1.120 < 6.1.175","Linux >= 6.6.64 < 6.6.136","Linux >= 6.12.2 < 6.12.84","Linux >= 4.19.325 < 4.20","Linux >= 5.4.287 < 5.5","Linux >= 6.11.11 < 6.12","Linux 6.13"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T15:24:35.844861Z"},"published":"2026-05-01","updated":"2026-11-06","sourceUpdated":"2026-11-06T15:32:23.615Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31701","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"}],"tags":["cve.org"],"epss":0.00117,"epssPercentile":0.01648,"ingestedAt":"2026-11-06T15:54:04.044Z","slug":"CVE-2026-31701","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 4dd821dcbfcecf7af6a08370b0b217cde2818acf < 493b3a682ededc804555755f5d2193201339612d`\n- `Linux >= cadf1d8e9ddcd74584ec961aeac14ac549b261d8 < dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e`\n- `Linux >= 237f3faf0177bdde728fa3106d730d806436aa4d < ac7345f68cda6989016d85d63f7b244c064aa8f6`\n- `Linux >= 4507a8b9b30344c5ddd8219945f446d47e966a6d < f6634af5de728a46792f674a66d7843570cb68f7`\n- `Linux >= a3f9314752dbb6f6aa1f0f2b4c58243bda800738 < 1d9be95aee6c6246a21752e60c9519902649f482`\n- `Linux >= b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c < 6473ed16df1fe88051140611b3eb9a49be7f429e`\n- `Linux >= b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c < 59b622a043cffc58b7638cd85ae6c30a0904f8e6`\n- `Linux >= b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c < 80bb50e2d459213cccff3111d5ef98ed4238c0d5`\n- `Linux 3993edf44d3df7b6e8c753eac6ac8783473fcbab`\n- `Linux ebad462eec93b0f701dfe4de98990e7355283801`\n- `Linux dd0de8cb708951cebf727aa045e8242ba651bb52`\n- `Linux >= 5.10.231 < 5.10.258`\n- `Linux >= 5.15.174 < 5.15.209`\n- `Linux >= 6.1.120 < 6.1.175`\n- `Linux >= 6.6.64 < 6.6.136`\n- `Linux >= 6.12.2 < 6.12.84`\n- `Linux >= 4.19.325 < 4.20`\n- `Linux >= 5.4.287 < 5.5`\n- `Linux >= 6.11.11 < 6.12`\n- `Linux 6.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}