Local Privilege Escalation Vulnerability in MSI Feature Manager by MSI
CVE-2026-57851

8.5HIGH

Key Information:

Vendor

Micro-star International (msi)

Status
Kerncorelib64.sys
Vendor
CVE Published:
7 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-57851?

The MSI Feature Manager, through its KernCoreLib64.sys kernel driver, introduces a local privilege escalation vulnerability. This flaw enables any locally authenticated user to execute arbitrary read/write operations on physical memory and conduct unrestricted I/O port operations. By exploiting exposed IOCTL handlers, attackers can manipulate kernel objects, interfere with kernel-mode callbacks, evade Protected Process Light defenses, and incapacitate security applications. This situation presents a significant risk to system integrity and security, necessitating immediate attention and remediation.

Affected Version(s)

KernCoreLib64.sys physical memory

KernCoreLib64.sys physical memory

KernCoreLib64.sys I/O ports

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-57851 - Proof of Concept

References

https://github.com/readmsr/MSI_FeatureManager_CVE
exploit
https://www.vulncheck.com/advisories/msi-gamegaraj-kernco...
third-party-advisory

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Turan Doruk Cerit
.