CVE-2026-68452 PUBLISHED

s390/zcrypt: Validate length for CCA AES cipher key requests

Assigner: Linux
Reserved: 30.07.2026 Published: 13.08.2026 Updated: 13.08.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to 406b317ea2b501f6f5eca1264293c9399a73a778 (excl.)
  • affected from 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to 4fc46deceda076d429ef3fab2ccf8d96629ebd23 (excl.)
  • affected from 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to ad93a1f1a45652478c0cf4eb029114e03af57f3b (excl.)
  • affected from 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to 3859f630b674801a00bca39bc451f52288591f65 (excl.)
  • affected from 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to 06afe425d5283b9764303de47f554da5a808ce8a (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.4 is affected
  • unaffected from 0 to 5.4 (excl.)
  • unaffected from 6.6.151 to 6.6.* (incl.)
  • unaffected from 6.12.103 to 6.12.* (incl.)
  • unaffected from 6.18.44 to 6.18.* (incl.)
  • unaffected from 7.1.8 to 7.1.* (incl.)
  • unaffected from 7.2-rc6 to * (incl.)

References