Vulnerability in Micro-Star International (Msi) Kerncorelib64.sys
CVE-2026-57851
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (5.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Micro-Star International (Msi) Kerncorelib64.sys — versions 0, physical memory, I/O ports
Weakness classification (CWE)
Public proof-of-concept exploits
References
- MSI_FeatureManager_CVE PoC - readmsr (exploit)
- www.vulncheck.com/advisories/msi-gamegaraj-kerncorelib64-sys-privilege-escalati… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-57851?
- CVE-2026-57851 is a high-severity vulnerability in Micro-Star International (Msi) Kerncorelib64.sys, classified under CWE-782. CVSS score: 7.8/10. Published 2026-07-07.
- How severe is CVE-2026-57851?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2026-57851 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.