CVE-2026-53369

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 832ab4a882dc9b3c0155490d9993642ef545fd22affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7d1b6adbf90df6c8941090d5646fbeca25ba9770affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3dede76d525919bb966f9213e131af685de5ff99affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 50dfaf4a027742b4fcdc3e9305e7199ece9bc6a6affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 31605bbe94557bff721eaf041001169d44ac6f98affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1873eb81c65d3f849418d7386baa39c439c9fc38affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fdb26e628d2a211a23815d375bd33bdf863344e2affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 55d41b0a20128e86b9e960dd2e3f0a2d69a18df7affected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.88 <= 6.12.*unaffected
LinuxLinux6.18.30 <= 6.18.*unaffected
LinuxLinux7.0.7 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References