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Vulnerability record · CVE-2026-53369 · published 19 July 2026

CVE-2026-53369: Linux kernel vulnerability

Linux · Linux Kernel

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.

8.4 CVSS 3.1 High EPSS 0.21% · top 90.5%
8.4CVSS 3.1 base score
0.21%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
29 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/1873eb81c65d3f849418d7386baa39c439c9fc38 Patch
https://git.kernel.org/stable/c/31605bbe94557bff721eaf041001169d44ac6f98 Patch
https://git.kernel.org/stable/c/3dede76d525919bb966f9213e131af685de5ff99 Patch
https://git.kernel.org/stable/c/50dfaf4a027742b4fcdc3e9305e7199ece9bc6a6 Patch
https://git.kernel.org/stable/c/55d41b0a20128e86b9e960dd2e3f0a2d69a18df7 Patch
https://git.kernel.org/stable/c/7d1b6adbf90df6c8941090d5646fbeca25ba9770 Patch
https://git.kernel.org/stable/c/832ab4a882dc9b3c0155490d9993642ef545fd22 Patch
https://git.kernel.org/stable/c/fdb26e628d2a211a23815d375bd33bdf863344e2 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-53369), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.