ghsa-wcw6-xhvq-24qp
Vulnerability from github
Published
2024-11-05 18:32
Modified
2024-11-08 21:33
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

nilfs2: fix kernel bug due to missing clearing of buffer delay flag

Syzbot reported that after nilfs2 reads a corrupted file system image and degrades to read-only, the BUG_ON check for the buffer delay flag in submit_bh_wbc() may fail, causing a kernel bug.

This is because the buffer delay flag is not cleared when clearing the buffer state flags to discard a page/folio or a buffer head. So, fix this.

This became necessary when the use of nilfs2's own page clear routine was expanded. This state inconsistency does not occur if the buffer is written normally by log writing.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-50116"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-05T18:15:14Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix kernel bug due to missing clearing of buffer delay flag\n\nSyzbot reported that after nilfs2 reads a corrupted file system image\nand degrades to read-only, the BUG_ON check for the buffer delay flag\nin submit_bh_wbc() may fail, causing a kernel bug.\n\nThis is because the buffer delay flag is not cleared when clearing the\nbuffer state flags to discard a page/folio or a buffer head. So, fix\nthis.\n\nThis became necessary when the use of nilfs2\u0027s own page clear routine\nwas expanded.  This state inconsistency does not occur if the buffer\nis written normally by log writing.",
  "id": "GHSA-wcw6-xhvq-24qp",
  "modified": "2024-11-08T21:33:53Z",
  "published": "2024-11-05T18:32:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50116"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/033bc52f35868c2493a2d95c56ece7fc155d7cb3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/27524f65621f490184f2ace44cd8e5f3685af4a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/412a30b1b28d6073ba29c46a2b0f324c5936293f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6ed469df0bfbef3e4b44fca954a781919db9f7ab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/743c78d455e784097011ea958b27396001181567"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/822203f6355f4b322d21e7115419f6b98284be25"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f2ab98371c2f2488bf3bf3f9b2a73510545e9c1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6f58ff2d4c552927fe9a187774e668ebba6c7aa"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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