CVE-2026-68451 PUBLISHED

s390/zcrypt: Validate length for CCA ECC private 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 ECC private key requests

cca_ecc2protkey() 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 fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e (excl.)
  • affected from fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5 (excl.)
  • affected from fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to 013a4484f061a2b41f052e25c0015203287e63f1 (excl.)
  • affected from fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to 8fa3e9435a13c335efb63fb4f4e77531a0031159 (excl.)
  • affected from fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to a9ae0f6dd45c3ccc1d69363f7aea8af179122730 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.10 is affected
  • unaffected from 0 to 5.10 (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