ghsa-74gq-xq9h-vp3g
Vulnerability from github
Published
2025-06-18 12:30
Modified
2025-06-18 12:30
Details

In the Linux kernel, the following vulnerability has been resolved:

ALSA: bcd2000: Fix a UAF bug on the error path of probing

When the driver fails in snd_card_register() at probe time, it will free the 'bcd2k->midi_out_urb' before killing it, which may cause a UAF bug.

The following log can reveal it:

[ 50.727020] BUG: KASAN: use-after-free in bcd2000_input_complete+0x1f1/0x2e0 [snd_bcd2000] [ 50.727623] Read of size 8 at addr ffff88810fab0e88 by task swapper/4/0 [ 50.729530] Call Trace: [ 50.732899] bcd2000_input_complete+0x1f1/0x2e0 [snd_bcd2000]

Fix this by adding usb_kill_urb() before usb_free_urb().

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50229"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:53Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: bcd2000: Fix a UAF bug on the error path of probing\n\nWhen the driver fails in snd_card_register() at probe time, it will free\nthe \u0027bcd2k-\u003emidi_out_urb\u0027 before killing it, which may cause a UAF bug.\n\nThe following log can reveal it:\n\n[   50.727020] BUG: KASAN: use-after-free in bcd2000_input_complete+0x1f1/0x2e0 [snd_bcd2000]\n[   50.727623] Read of size 8 at addr ffff88810fab0e88 by task swapper/4/0\n[   50.729530] Call Trace:\n[   50.732899]  bcd2000_input_complete+0x1f1/0x2e0 [snd_bcd2000]\n\nFix this by adding usb_kill_urb() before usb_free_urb().",
  "id": "GHSA-74gq-xq9h-vp3g",
  "modified": "2025-06-18T12:30:57Z",
  "published": "2025-06-18T12:30:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50229"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/05e0bb8c3c4dde3e21b9c1cf9395afb04e8b24db"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d6a246cf97c380f2da76591f03019dd9c9599c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/348620464a5c127399ac09b266f494f393661952"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4fc41f7ebb7efca282f1740ea934d16f33c1d109"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e7338f4dd92b2f8915a82abfa1dd3ad3464bea0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64ca7f50ad96c2c65ae390b954925a36eabe04aa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a718eba7e458e2f40531be3c6b6a0028ca7fcace"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0d4af0a4763ddc02344789ef2a281c494bc330d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ffb2759df7efbc00187bfd9d1072434a13a54139"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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