PT-2026-61071 · Linux · Linux

CVE-2026-53369 · Published 2026-07-19 · Updated 2026-07-19

NVD

CVSS v3.1

8.4

High

Base vector

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

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.

Fix

Related Identifiers

CVE-2026-53369

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-53369 · Security Note
• https://git.kernel.org/stable/c/55d41b0a20128e86b9e960dd2e3f0a2d69a18df7 · Note
• https://git.kernel.org/stable/c/50dfaf4a027742b4fcdc3e9305e7199ece9bc6a6 · Note
• https://git.kernel.org/stable/c/7d1b6adbf90df6c8941090d5646fbeca25ba9770 · Note
• https://git.kernel.org/stable/c/fdb26e628d2a211a23815d375bd33bdf863344e2 · Note
• https://git.kernel.org/stable/c/3dede76d525919bb966f9213e131af685de5ff99 · Note
• https://git.kernel.org/stable/c/832ab4a882dc9b3c0155490d9993642ef545fd22 · Note
• https://git.kernel.org/stable/c/1873eb81c65d3f849418d7386baa39c439c9fc38 · Note
• https://git.kernel.org/stable/c/31605bbe94557bff721eaf041001169d44ac6f98 · Note