CVE-2026-68452 is a vulnerability in Linux Kernel
Published on August 13, 2026
s390/zcrypt: Validate length for CCA AES cipher key requests
In the Linux kernel, the following vulnerability has been resolved:
s390/zcrypt: Validate length for CCA AES cipher key requests
cca_cipher2protkey() derives the copy length for the CPRB parameter
block directly from the length field in the key token. Reject the
request early if the token length exceeds the available space in the
parameter block.
Products Associated with CVE-2026-68452
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Affected Versions
Linux:- Version 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd and below 406b317ea2b501f6f5eca1264293c9399a73a778 is affected.
- Version 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd and below 4fc46deceda076d429ef3fab2ccf8d96629ebd23 is affected.
- Version 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd and below ad93a1f1a45652478c0cf4eb029114e03af57f3b is affected.
- Version 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd and below 3859f630b674801a00bca39bc451f52288591f65 is affected.
- Version 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd and below 06afe425d5283b9764303de47f554da5a808ce8a is affected.
- Version 5.4 is affected.
- Before 5.4 is unaffected.
- Version 6.6.151, <= 6.6.* is unaffected.
- Version 6.12.103, <= 6.12.* is unaffected.
- Version 6.18.44, <= 6.18.* is unaffected.
- Version 7.1.8, <= 7.1.* is unaffected.
- Version 7.2-rc6, <= * is unaffected.