CVE-2026-68451

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

State: Published
Severity: 7.8 High
Published: Aug 13, 2026
Updated: Oct 19, 2026
Reserved: Jul 30, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Affected Products

Product	Versions
LinuxLinux	fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before 7dc306ff7c4d951582adaae65e0aee9fb4968dbeAffected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before 447a37a6bef11bfd3645069e380460b11386e2b9Affected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before f0831f13c42c1261d449dcee8a035e1c6cd9fcaaAffected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before dd25bd9b0f36849808bd7625dcc59dd4c1aeef3eAffected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5Affected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before 013a4484f061a2b41f052e25c0015203287e63f1Affected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before 8fa3e9435a13c335efb63fb4f4e77531a0031159Affected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before a9ae0f6dd45c3ccc1d69363f7aea8af179122730Affected
LinuxLinux	5.10Affected before 5.10Not affected 5.10.265 through 5.10.Not affected 5.15.216 through 5.15.Not affected 6.1.183 through 6.1.Not affected 6.6.151 through 6.6.Not affected 6.12.103 through 6.12.Not affected 6.18.44 through 6.18.Not affected 7.1.8 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before 7dc306ff7c4d951582adaae65e0aee9fb4968dbeAffected
fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before 447a37a6bef11bfd3645069e380460b11386e2b9Affected
fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before f0831f13c42c1261d449dcee8a035e1c6cd9fcaaAffected
fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before dd25bd9b0f36849808bd7625dcc59dd4c1aeef3eAffected
fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5Affected
fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before 013a4484f061a2b41f052e25c0015203287e63f1Affected
fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before 8fa3e9435a13c335efb63fb4f4e77531a0031159Affected
fa6999e326fe7851ecbd572b8cb9be8e930ebf41 to before a9ae0f6dd45c3ccc1d69363f7aea8af179122730Affected

LinuxLinux

5.10Affected
before 5.10Not affected
5.10.265 through 5.10.*Not affected
5.15.216 through 5.15.*Not affected
6.1.183 through 6.1.*Not affected
6.6.151 through 6.6.*Not affected
6.12.103 through 6.12.*Not affected
6.18.44 through 6.18.*Not affected
7.1.8 through 7.1.*Not affected
7.2 and laterNot affected

References

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