s390/pkey: Check length in PKEY_VERIFYPROTK ioctl

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64559
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_VERIFYPROTK ioctl Explicitly check the buffer length request structure provided by user-space and fail, if it exceeds the buffer size.

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 0.021370000 (date 2026-07-30)

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 0a9e34ccbe772b8f321388cdbdf4f22b94e513e7 git Not specified
CNA Linux Linux affected 8fcc231ce3bea12b78bb94b280cdc03cff342435 693bf91d4db134f9b1c2840c8e287eee3d993bac git Not specified
CNA Linux Linux affected 8fcc231ce3bea12b78bb94b280cdc03cff342435 7e7e03848c918aa0acad5ffd75d929e3afec1554 git Not specified
CNA Linux Linux affected 8fcc231ce3bea12b78bb94b280cdc03cff342435 b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970 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/b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0a9e34ccbe772b8f321388cdbdf4f22b94e513e7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/693bf91d4db134f9b1c2840c8e287eee3d993bac 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7e7e03848c918aa0acad5ffd75d929e3afec1554 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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