CVE-2026-53369
Last modified
CVE-2026-53369 is a high-severity vulnerability rated 8.4/10 on the CVSS scale. 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. EPSS estimates a 0.14% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 832ab4a882dc9b3c0155490d9993642ef545fd22; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 7d1b6adbf90df6c8941090d5646fbeca25ba9770; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3dede76d525919bb966f9213e131af685de5ff99; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 50dfaf4a027742b4fcdc3e9305e7199ece9bc6a6; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 31605bbe94557bff721eaf041001169d44ac6f98; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1873eb81c65d3f849418d7386baa39c439c9fc38; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < fdb26e628d2a211a23815d375bd33bdf863344e2; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 55d41b0a20128e86b9e960dd2e3f0a2d69a18df7 |
| Linux | Linux | 2.6.12 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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