ghsa-gpvh-jcjq-x69v
Vulnerability from github
Published
2024-05-21 18:31
Modified
2024-05-21 18:31
Details

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

ALSA: hda: Do not unset preset when cleaning up codec

Several functions that take part in codec's initialization and removal are re-used by ASoC codec drivers implementations. Drivers mimic the behavior of hda_codec_driver_probe/remove() found in sound/pci/hda/hda_bind.c with their component->probe/remove() instead.

One of the reasons for that is the expectation of snd_hda_codec_device_new() to receive a valid pointer to an instance of struct snd_card. This expectation can be met only once sound card components probing commences.

As ASoC sound card may be unbound without codec device being actually removed from the system, unsetting ->preset in snd_hda_codec_cleanup_for_unbind() interferes with module unload -> load scenario causing null-ptr-deref. Preset is assigned only once, during device/driver matching whereas ASoC codec driver's module reloading may occur several times throughout the lifetime of an audio stack.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-52736"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T16:15:13Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: hda: Do not unset preset when cleaning up codec\n\nSeveral functions that take part in codec\u0027s initialization and removal\nare re-used by ASoC codec drivers implementations. Drivers mimic the\nbehavior of hda_codec_driver_probe/remove() found in\nsound/pci/hda/hda_bind.c with their component-\u003eprobe/remove() instead.\n\nOne of the reasons for that is the expectation of\nsnd_hda_codec_device_new() to receive a valid pointer to an instance of\nstruct snd_card. This expectation can be met only once sound card\ncomponents probing commences.\n\nAs ASoC sound card may be unbound without codec device being actually\nremoved from the system, unsetting -\u003epreset in\nsnd_hda_codec_cleanup_for_unbind() interferes with module unload -\u003e load\nscenario causing null-ptr-deref. Preset is assigned only once, during\ndevice/driver matching whereas ASoC codec driver\u0027s module reloading may\noccur several times throughout the lifetime of an audio stack.",
  "id": "GHSA-gpvh-jcjq-x69v",
  "modified": "2024-05-21T18:31:19Z",
  "published": "2024-05-21T18:31:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52736"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/427ca2530da8dc61a42620d7113b05e187b6c2c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7fc4e7191eae9d9325511e03deadfdb2224914f8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87978e6ad45a16835cc58234451111091be3c59a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e909f5f2aa55a8f9aa6919cce08015cb0e8d4668"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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