SEPTEMBER 20, 2026
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Case File

CVE-2026-64559

HIGH · CVSS 7.8 EPSS 0.12%

Source: NVD + CISA KEV + EPSS · Published 2026-07-29 · Last synced 2026-08-28

CyberRota Analysis

AI-Generated

A buffer overflow vulnerability exists in the Linux kernel's handling of the PKEY_VERIFYPROTK ioctl in the s390 architecture, which could allow an attacker to exploit improperly validated user-space requests. This flaw poses a high risk, potentially leading to unauthorized access or system crashes. Organizations using affected Linux distributions, particularly those operating on s390 hardware, should prioritize patching this vulnerability to mitigate potential exploitation risks.

CVE
CVE-2026-64559
Severity
HIGH
CVSS
7.8
EPSS
0.12%
Linux

Original NVD 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.