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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-68452
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-13 15:19:57 UTC
Updated2026-08-13 23:17:38 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd 406b317ea2b501f6f5eca1264293c9399a73a778 git Not specified
CNA Linux Linux affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd 4fc46deceda076d429ef3fab2ccf8d96629ebd23 git Not specified
CNA Linux Linux affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd ad93a1f1a45652478c0cf4eb029114e03af57f3b git Not specified
CNA Linux Linux affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd 3859f630b674801a00bca39bc451f52288591f65 git Not specified
CNA Linux Linux affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd 06afe425d5283b9764303de47f554da5a808ce8a git Not specified
CNA Linux Linux affected 5.4 Not specified
CNA Linux Linux unaffected 5.4 semver Not specified
CNA Linux Linux unaffected 6.6.151 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.103 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc6 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ad93a1f1a45652478c0cf4eb029114e03af57f3b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3859f630b674801a00bca39bc451f52288591f65 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/06afe425d5283b9764303de47f554da5a808ce8a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/406b317ea2b501f6f5eca1264293c9399a73a778 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4fc46deceda076d429ef3fab2ccf8d96629ebd23 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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