{"cve":"CVE-2026-31701","nvd":{"published":"2026-05-01T14:16:20.020","modified":"2026-06-17T10:34:16.173","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/1d9be95aee6c6246a21752e60c9519902649f482","https://git.kernel.org/stable/c/493b3a682ededc804555755f5d2193201339612d","https://git.kernel.org/stable/c/59b622a043cffc58b7638cd85ae6c30a0904f8e6","https://git.kernel.org/stable/c/6473ed16df1fe88051140611b3eb9a49be7f429e","https://git.kernel.org/stable/c/80bb50e2d459213cccff3111d5ef98ed4238c0d5"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:33:09.003606135+00:00"},"epss":{"cve":"CVE-2026-31701","score":0.00117,"percentile":0.01628,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}