{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-31701",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-31701"
  ],
  "published": "2026-05-01T13:56:32Z",
  "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->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.",
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-31701"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/493b3a682ededc804555755f5d2193201339612d"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ac7345f68cda6989016d85d63f7b244c064aa8f6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f6634af5de728a46792f674a66d7843570cb68f7"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1d9be95aee6c6246a21752e60c9519902649f482"
    },
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      "url": "https://git.kernel.org/stable/c/6473ed16df1fe88051140611b3eb9a49be7f429e"
    },
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      "url": "https://git.kernel.org/stable/c/59b622a043cffc58b7638cd85ae6c30a0904f8e6"
    },
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      "url": "https://git.kernel.org/stable/c/80bb50e2d459213cccff3111d5ef98ed4238c0d5"
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-06-15T02:03:26Z"
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}