GHSA-RQJM-P6MW-3JJ9

Vulnerability from github – Published: 2026-07-19 09:31 – Updated: 2026-07-20 15:31
VLAI
Details

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

udf: reject descriptors with oversized CRC length

udf_read_tagged() skips CRC verification when descCRCLength + sizeof(struct tag) exceeds the block size. A crafted UDF image can set descCRCLength to an oversized value to bypass CRC validation entirely; the descriptor is then accepted based solely on the 8-bit tag checksum, which is trivially recomputable.

Reject such descriptors instead of silently accepting them. A legitimate single-block descriptor should never have a CRC length that exceeds the block.

Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-53369"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T09:17:02Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: reject descriptors with oversized CRC length\n\nudf_read_tagged() skips CRC verification when descCRCLength +\nsizeof(struct tag) exceeds the block size.  A crafted UDF image can\nset descCRCLength to an oversized value to bypass CRC validation\nentirely; the descriptor is then accepted based solely on the 8-bit\ntag checksum, which is trivially recomputable.\n\nReject such descriptors instead of silently accepting them.  A\nlegitimate single-block descriptor should never have a CRC length that\nexceeds the block.",
  "id": "GHSA-rqjm-p6mw-3jj9",
  "modified": "2026-07-20T15:31:43Z",
  "published": "2026-07-19T09:31:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53369"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1873eb81c65d3f849418d7386baa39c439c9fc38"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31605bbe94557bff721eaf041001169d44ac6f98"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3dede76d525919bb966f9213e131af685de5ff99"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50dfaf4a027742b4fcdc3e9305e7199ece9bc6a6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55d41b0a20128e86b9e960dd2e3f0a2d69a18df7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d1b6adbf90df6c8941090d5646fbeca25ba9770"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/832ab4a882dc9b3c0155490d9993642ef545fd22"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fdb26e628d2a211a23815d375bd33bdf863344e2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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