CVE-2026-64559

HighCVSS 7.8/10Last modified Nov 3, 2026

Description

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-125

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 8fcc231ce3bea12b78bb94b280cdc03cff342435, < 0a9e34ccbe772b8f321388cdbdf4f22b94e513e7; >= 8fcc231ce3bea12b78bb94b280cdc03cff342435, < 693bf91d4db134f9b1c2840c8e287eee3d993bac; >= 8fcc231ce3bea12b78bb94b280cdc03cff342435, < 7e7e03848c918aa0acad5ffd75d929e3afec1554; >= 8fcc231ce3bea12b78bb94b280cdc03cff342435, < b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970
LinuxLinux6.12

References

Timeline

Published
Jul 29, 2026
Last modified
Nov 3, 2026
NVD status
Awaiting Analysis

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CVE-2026-64559: High severity, CVSS 7.8 | Vulnix