GHSA-XHH8-8JQ9-8VF6

Vulnerability from github – Published: 2024-05-21 18:31 – Updated: 2025-09-24 00:30
VLAI
Details

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

fs/jfs: Add validity check for db_maxag and db_agpref

Both db_maxag and db_agpref are used as the index of the db_agfree array, but there is currently no validity check for db_maxag and db_agpref, which can lead to errors.

The following is related bug reported by Syzbot:

UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:639:20 index 7936 is out of range for type 'atomic_t[128]'

Add checking that the values of db_maxag and db_agpref are valid indexes for the db_agfree array.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2023-52804"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-129"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T16:15:18Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/jfs: Add validity check for db_maxag and db_agpref\n\nBoth db_maxag and db_agpref are used as the index of the\ndb_agfree array, but there is currently no validity check for\ndb_maxag and db_agpref, which can lead to errors.\n\nThe following is related bug reported by Syzbot:\n\nUBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:639:20\nindex 7936 is out of range for type \u0027atomic_t[128]\u0027\n\nAdd checking that the values of db_maxag and db_agpref are valid\nindexes for the db_agfree array.",
  "id": "GHSA-xhh8-8jq9-8vf6",
  "modified": "2025-09-24T00:30:40Z",
  "published": "2024-05-21T18:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52804"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f74d336990f37703a8eee77153463d65b67f70e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2323de34a3ae61a9f9b544c18583f71cea86721f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/32bd8f1cbcf8b663e29dd1f908ba3a129541a11b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5013f8269887642cca784adc8db9b5f0b771533f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64933ab7b04881c6c18b21ff206c12278341c72e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a0649e2dd4a3595b5595a29d0064d047c2fae2fb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6c8863fb3f57700ab583d875adda04caaf2278a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce15b0f1a431168f07b1cc6c9f71206a2db5c809"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dca403bb035a565bb98ecc1dda5d30f676feda40"
    }
  ],
  "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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