CVE-2026-57851: Exposed IOCTL with Insufficient Access Control in Micro-Star International (MSI) KernCoreLib64.sys
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.
CVE-2026-57851: Exposed IOCTL with Insufficient Access Control in Micro-Star International (MSI) KernCoreLib64.sys
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.
CVSS v4.0
Score 8.5high
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-06-25T18:48:00.282Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4d2cd5c9d9e3dbe3825433
Added to database: 07/07/2026, 16:44:05 UTC
Last updated: 07/07/2026, 16:44:05 UTC
Views: 1
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