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CVE-2026-57851

MSI KernCoreLib64.sys Privilege Escalation via IOCTL Handlers

CVSS 4.0 8.5 HIGHCVSS 3.1 7.8 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-57851

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-57851

Published

KernCoreLib64.sys

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "defaultStatus": "affected",
                    "vendor": "Micro-Star International (MSI)",
                    "product": "KernCoreLib64.sys",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "versionType": "custom",
                            "lessThanOrEqual": "1.0.2605.1301"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON