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.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00186.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

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References
Link Providers
https://git.kernel.org/stable/c/1873eb81c65d3f849418d7386baa39c439c9fc38 cve-icon
https://git.kernel.org/stable/c/31605bbe94557bff721eaf041001169d44ac6f98 cve-icon
https://git.kernel.org/stable/c/3dede76d525919bb966f9213e131af685de5ff99 cve-icon
https://git.kernel.org/stable/c/50dfaf4a027742b4fcdc3e9305e7199ece9bc6a6 cve-icon
https://git.kernel.org/stable/c/55d41b0a20128e86b9e960dd2e3f0a2d69a18df7 cve-icon
https://git.kernel.org/stable/c/7d1b6adbf90df6c8941090d5646fbeca25ba9770 cve-icon
https://git.kernel.org/stable/c/832ab4a882dc9b3c0155490d9993642ef545fd22 cve-icon
https://git.kernel.org/stable/c/fdb26e628d2a211a23815d375bd33bdf863344e2 cve-icon
History

Sun, 19 Jul 2026 09:15:00 +0000

Type Values Removed Values Added
Description 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.
Title udf: reject descriptors with oversized CRC length
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-07-19T09:10:30.283Z

Reserved: 2026-06-09T07:44:35.401Z

Link: CVE-2026-53369

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

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