{"api_version":"1","generated_at":"2026-07-23T12:57:46+00:00","cve":"CVE-2026-31701","urls":{"html":"https://cve.report/CVE-2026-31701","api":"https://cve.report/api/cve/CVE-2026-31701.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31701","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31701"},"summary":{"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-01 14:16:20","updated_at":"2026-06-01 17:16:56"},"problem_types":["NVD-CWE-noinfo"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/1d9be95aee6c6246a21752e60c9519902649f482","name":"https://git.kernel.org/stable/c/1d9be95aee6c6246a21752e60c9519902649f482","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f6634af5de728a46792f674a66d7843570cb68f7","name":"https://git.kernel.org/stable/c/f6634af5de728a46792f674a66d7843570cb68f7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e","name":"https://git.kernel.org/stable/c/dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/59b622a043cffc58b7638cd85ae6c30a0904f8e6","name":"https://git.kernel.org/stable/c/59b622a043cffc58b7638cd85ae6c30a0904f8e6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/80bb50e2d459213cccff3111d5ef98ed4238c0d5","name":"https://git.kernel.org/stable/c/80bb50e2d459213cccff3111d5ef98ed4238c0d5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/493b3a682ededc804555755f5d2193201339612d","name":"https://git.kernel.org/stable/c/493b3a682ededc804555755f5d2193201339612d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6473ed16df1fe88051140611b3eb9a49be7f429e","name":"https://git.kernel.org/stable/c/6473ed16df1fe88051140611b3eb9a49be7f429e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ac7345f68cda6989016d85d63f7b244c064aa8f6","name":"https://git.kernel.org/stable/c/ac7345f68cda6989016d85d63f7b244c064aa8f6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31701","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31701","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4dd821dcbfcecf7af6a08370b0b217cde2818acf 493b3a682ededc804555755f5d2193201339612d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cadf1d8e9ddcd74584ec961aeac14ac549b261d8 dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 237f3faf0177bdde728fa3106d730d806436aa4d ac7345f68cda6989016d85d63f7b244c064aa8f6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4507a8b9b30344c5ddd8219945f446d47e966a6d f6634af5de728a46792f674a66d7843570cb68f7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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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."}],"providerMetadata":{"dateUpdated":"2026-06-01T16:13:42.319Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}],"title":"ALSA: caiaq: take a reference on the USB device in create_card()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31701","datePublished":"2026-05-01T13:56:00.869Z","dateReserved":"2026-03-09T15:48:24.132Z","dateUpdated":"2026-06-01T16:13:42.319Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-01 14:16:20","lastModifiedDate":"2026-06-01 17:16:56","problem_types":["NVD-CWE-noinfo"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.25","matchCriteriaId":"8B0A7E0E-F6D8-45DB-8CD9-01839FE40A6C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.0.2","matchCriteriaId":"1BD58F1E-7C20-4C0D-92A2-FAC5CBFBE8A8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:*","matchCriteriaId":"5A3F9505-6B98-4269-8B81-127E55A1BF00"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*","matchCriteriaId":"B1EF7059-E670-45F4-B422-54C40FA86390"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*","matchCriteriaId":"0D38F0BF-A728-4133-A358-D44A2F7EE6D6"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31701","Ordinal":"1","Title":"ALSA: caiaq: take a reference on the USB device in create_card()","CVE":"CVE-2026-31701","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31701","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ALSA: caiaq: take a reference on the USB device in create_card()"}]}}}