CVE-2026-53369 (GCVE-0-2026-53369)

Vulnerability from cvelistv5 – Published: 2026-07-19 09:10 – Updated: 2026-07-19 09:10
VLAI
Title
udf: reject descriptors with oversized CRC length
Summary
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
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 832ab4a882dc9b3c0155490d9993642ef545fd22 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7d1b6adbf90df6c8941090d5646fbeca25ba9770 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3dede76d525919bb966f9213e131af685de5ff99 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 50dfaf4a027742b4fcdc3e9305e7199ece9bc6a6 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 31605bbe94557bff721eaf041001169d44ac6f98 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1873eb81c65d3f849418d7386baa39c439c9fc38 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < fdb26e628d2a211a23815d375bd33bdf863344e2 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 55d41b0a20128e86b9e960dd2e3f0a2d69a18df7 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.88 , ≤ 6.12.* (semver)
Unaffected: 6.18.30 , ≤ 6.18.* (semver)
Unaffected: 7.0.7 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T09:10:30.283Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/832ab4a882dc9b3c0155490d9993642ef545fd22"
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        },
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          "url": "https://git.kernel.org/stable/c/3dede76d525919bb966f9213e131af685de5ff99"
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    "datePublished": "2026-07-19T09:10:30.283Z",
    "dateReserved": "2026-06-09T07:44:35.401Z",
    "dateUpdated": "2026-07-19T09:10:30.283Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "date": "2026-07-19",
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      "percentile": "0.08339"
    },
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.