CVE-2026-57851: Micro-Star International Msi KERNCORELIB64.SYS

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

MSI Feature Manager contains a local privilege escalation vulnerability in the KernCoreLib64.sys kernel driver that allows any locally logged-on user to perform arbitrary physical memory read/write and unrestricted I/O port operations by accessing exposed IOCTL handlers without administrator privileges. Attackers can exploit the accessible device object through IOCTL handlers to manipulate kernel objects, tamper with kernel-mode callbacks, bypass Protected Process Light protections, and disable security software.

Affected products

• Micro-Star International Msi KERNCORELIB64.SYS: up to and including 1.0.2605.1301

Published 2026-07-07. Last modified 2026-07-10.