CVE-2026-64559

High · 7.8

CVSS

7.8

EPSS

0.1%

Published

Jul 29, 2026

CISA due date

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The record

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.

Affected packages

Ecosystem	Package	Introduced	Fixed