CVE-2026-53369 – udf: reject descriptors with oversized CRC length

CVE ID :CVE-2026-53369

Published : July 19, 2026, 9:17 a.m. | 23 minutes ago

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.

Severity: 0.0 | NA

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