CVE-2026-64559

In 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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0a9e34ccbe772b8f321388cdbdf4f22b94e513e7
https://git.kernel.org/stable/c/693bf91d4db134f9b1c2840c8e287eee3d993bac
https://git.kernel.org/stable/c/7e7e03848c918aa0acad5ffd75d929e3afec1554
https://git.kernel.org/stable/c/b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-29 17:16

Updated : 2026-08-17 05:18

NVD link : CVE-2026-64559

Mitre link : CVE-2026-64559

CVE.ORG link : CVE-2026-64559

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-64559", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "8fcc231ce3bea12b78bb94b280cdc03cff342435", "lessThan": "0a9e34ccbe772b8f321388cdbdf4f22b94e513e7", "versionType": "git"}, {"status": "affected", "version": "8fcc231ce3bea12b78bb94b280cdc03cff342435", "lessThan": "693bf91d4db134f9b1c2840c8e287eee3d993bac", "versionType": "git"}, {"status": "affected", "version": "8fcc231ce3bea12b78bb94b280cdc03cff342435", "lessThan": "7e7e03848c918aa0acad5ffd75d929e3afec1554", "versionType": "git"}, {"status": "affected", "version": "8fcc231ce3bea12b78bb94b280cdc03cff342435", "lessThan": "b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970", "versionType": "git"}], "programFiles": ["drivers/s390/crypto/pkey_api.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.12"}, {"status": "unaffected", "version": "0", "lessThan": "6.12", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/s390/crypto/pkey_api.c"], "defaultStatus": "affected"}]}], "published": "2026-07-29T17:16:53.523", "references": [{"url": "https://git.kernel.org/stable/c/0a9e34ccbe772b8f321388cdbdf4f22b94e513e7", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/693bf91d4db134f9b1c2840c8e287eee3d993bac", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7e7e03848c918aa0acad5ffd75d929e3afec1554", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/pkey: Check length in PKEY_VERIFYPROTK ioctl\n\nExplicitly check the buffer length request structure provided by\nuser-space and fail, if it exceeds the buffer size."}], "lastModified": "2026-08-17T05:18:01.617", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}