FKIE_CVE-2022-50300

Vulnerability from fkie_nvd - Published: 2025-09-15 15:15 - Updated: 2025-12-04 15:33
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/169a4cf46882974d4db6d85eb623ec898e51bbc0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1742e1c90c3da344f3bb9b1f1309b3f47482756aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b8e7ed42bc3ca0d0e4191ee394d34962d3624c22Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fce3713197ebba239e1c7e02174ed216ea1ee014Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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"
    }
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  "id": "CVE-2022-50300",
  "lastModified": "2025-12-04T15:33:20.600",
  "metrics": {
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          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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}


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