---
id: CVE-2026-57851
title: MSI KernCoreLib64.sys Privilege Escalation via IOCTL Handlers
summary: >-
  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…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-782
vendor: Micro-Star International (MSI)
product: KernCoreLib64.sys
affected:
  - KernCoreLib64.sys <= 1.0.2605.1301
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-07-07T17:00:44.711176Z'
exploitAvailable: true
published: '2026-07-07'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T14:17:53.654Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-57851'
references:
  - url: 'https://github.com/readmsr/MSI_FeatureManager_CVE'
    label: MSI_FeatureManager_CVE PoC - readmsr
  - url: >-
      https://www.vulncheck.com/advisories/msi-gamegaraj-kerncorelib64-sys-privilege-escalation-via-ioctl-handlers
tags:
  - cve.org
  - exploit-available
epss: 0.00166
epssPercentile: 0.0524
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/readmsr/MSI_FeatureManager_CVE'
  checkedAt: '2026-09-26T09:05:51.552Z'
ingestedAt: '2026-09-24T15:45:56.727Z'
---

## Overview

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

- `KernCoreLib64.sys <= 1.0.2605.1301`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.