s390/pkey: Check length in pkey_pckmo handler implementation

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64558
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-29 17:16:53 UTC
Updated2026-07-30 06:25:59 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: s390/pkey: Check length in pkey_pckmo handler implementation Explicitly check the length of the target buffer in the pkey_pckmo implementation of the key_to_protkey() handler function. The handler function fails, if the generated output data exceeds the length of the provided target buffer.

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

EPSS: 0.001200000 probability, percentile 0.021380000 (date 2026-07-31)

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 8fcc231ce3bea12b78bb94b280cdc03cff342435 02028a24e26d85262ab9c8fc4344e1f3503007fc git Not specified
CNA Linux Linux affected 8fcc231ce3bea12b78bb94b280cdc03cff342435 433e5e70cdc1edf382d28d08a885b22e2b98b7da git Not specified
CNA Linux Linux affected 8fcc231ce3bea12b78bb94b280cdc03cff342435 614aa0491c7a190556c2345dddee0b6f5ed90989 git Not specified
CNA Linux Linux affected 8fcc231ce3bea12b78bb94b280cdc03cff342435 1ac287e2af9a9112fe271427ef45eceb26bce8b4 git Not specified
CNA Linux Linux affected 6.12 Not specified
CNA Linux Linux unaffected 6.12 semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/614aa0491c7a190556c2345dddee0b6f5ed90989 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/02028a24e26d85262ab9c8fc4344e1f3503007fc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/433e5e70cdc1edf382d28d08a885b22e2b98b7da 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1ac287e2af9a9112fe271427ef45eceb26bce8b4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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