ghsa-45c3-pwch-8qg9
Vulnerability from github
Published
2025-02-27 18:31
Modified
2025-02-27 18:31
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

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

ALSA: pcm: Fix races among concurrent hw_params and hw_free calls

Currently we have neither proper check nor protection against the concurrent calls of PCM hw_params and hw_free ioctls, which may result in a UAF. Since the existing PCM stream lock can't be used for protecting the whole ioctl operations, we need a new mutex to protect those racy calls.

This patch introduced a new mutex, runtime->buffer_mutex, and applies it to both hw_params and hw_free ioctl code paths. Along with it, the both functions are slightly modified (the mmap_count check is moved into the state-check block) for code simplicity.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49291"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:05Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcm: Fix races among concurrent hw_params and hw_free calls\n\nCurrently we have neither proper check nor protection against the\nconcurrent calls of PCM hw_params and hw_free ioctls, which may result\nin a UAF.  Since the existing PCM stream lock can\u0027t be used for\nprotecting the whole ioctl operations, we need a new mutex to protect\nthose racy calls.\n\nThis patch introduced a new mutex, runtime-\u003ebuffer_mutex, and applies\nit to both hw_params and hw_free ioctl code paths.  Along with it, the\nboth functions are slightly modified (the mmap_count check is moved\ninto the state-check block) for code simplicity.",
  "id": "GHSA-45c3-pwch-8qg9",
  "modified": "2025-02-27T18:31:08Z",
  "published": "2025-02-27T18:31:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49291"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0090c13cbbdffd7da079ac56f80373a9a1be0bf8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f6947f5f5208f6ebd4d76a82a4757e2839a23f8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1bbf82d9f961414d6c76a08f7f843ea068e0ab7b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/33061d0fba51d2bf70a2ef9645f703c33fe8e438"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92ee3c60ec9fe64404dc035e7c41277d74aa26cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9cb6c40a6ebe4a0cfc9d6a181958211682cffea9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a42aa926843acca96c0dfbde2e835b8137f2f092"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fbeb492694ce0441053de57699e1e2b7bc148a69"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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