Vulnerability · Published Jul 7, 2026 · Assigned by VulnCheck
CVE-2026-57851MSI KernCoreLib64.sys Privilege Escalation via IOCTL Handlers
High 7.8
In plain English
A high-severity security flaw in KernCoreLib64.sys from Micro-Star International (MSI). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Micro-Star International (MSI) | KernCoreLib64.sys | 0 – through 1.0.2605.1301 |
Weakness: CWE-782 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H