ghsa-w775-9978-cp8r
Vulnerability from github
Published
2025-09-15 15:31
Modified
2025-09-15 15:31
Details

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

btrfs: fix extent map use-after-free when handling missing device in read_one_chunk

Store the error code before freeing the extent_map. Though it's reference counted structure, in that function it's the first and last allocation so this would lead to a potential use-after-free.

The error can happen eg. when chunk is stored on a missing device and the degraded mount option is missing.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216721

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50300"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-15T15:15:41Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix extent map use-after-free when handling missing device in read_one_chunk\n\nStore the error code before freeing the extent_map. Though it\u0027s\nreference counted structure, in that function it\u0027s the first and last\nallocation so this would lead to a potential use-after-free.\n\nThe error can happen eg. when chunk is stored on a missing device and\nthe degraded mount option is missing.\n\nBugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216721",
  "id": "GHSA-w775-9978-cp8r",
  "modified": "2025-09-15T15:31:26Z",
  "published": "2025-09-15T15:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50300"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/169a4cf46882974d4db6d85eb623ec898e51bbc0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1742e1c90c3da344f3bb9b1f1309b3f47482756a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b8e7ed42bc3ca0d0e4191ee394d34962d3624c22"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fce3713197ebba239e1c7e02174ed216ea1ee014"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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