CVE-2026-53369

udf: reject descriptors with oversized CRC length

State: Published
Severity: 8.4 High
Published: Jul 19, 2026
Updated: Oct 19, 2026
Reserved: Jun 9, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.4 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
LinuxLinux	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 832ab4a882dc9b3c0155490d9993642ef545fd22Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7d1b6adbf90df6c8941090d5646fbeca25ba9770Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 3dede76d525919bb966f9213e131af685de5ff99Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 50dfaf4a027742b4fcdc3e9305e7199ece9bc6a6Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 31605bbe94557bff721eaf041001169d44ac6f98Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 1873eb81c65d3f849418d7386baa39c439c9fc38Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before fdb26e628d2a211a23815d375bd33bdf863344e2Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 55d41b0a20128e86b9e960dd2e3f0a2d69a18df7Affected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 5.10.258 through 5.10.Not affected 5.15.209 through 5.15.Not affected 6.1.175 through 6.1.Not affected 6.6.140 through 6.6.Not affected 6.12.88 through 6.12.Not affected 6.18.30 through 6.18.Not affected 7.0.7 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 832ab4a882dc9b3c0155490d9993642ef545fd22Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7d1b6adbf90df6c8941090d5646fbeca25ba9770Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 3dede76d525919bb966f9213e131af685de5ff99Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 50dfaf4a027742b4fcdc3e9305e7199ece9bc6a6Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 31605bbe94557bff721eaf041001169d44ac6f98Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 1873eb81c65d3f849418d7386baa39c439c9fc38Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before fdb26e628d2a211a23815d375bd33bdf863344e2Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 55d41b0a20128e86b9e960dd2e3f0a2d69a18df7Affected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
5.10.258 through 5.10.*Not affected
5.15.209 through 5.15.*Not affected
6.1.175 through 6.1.*Not affected
6.6.140 through 6.6.*Not affected
6.12.88 through 6.12.*Not affected
6.18.30 through 6.18.*Not affected
7.0.7 through 7.0.*Not affected
7.1 and laterNot affected

References

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