CVE-2018-8438: Microsoft Windows 10

Medium severity, CVSS 6.8. EPSS: 7.2% chance of exploitation in the next 30 days.

A denial of service vulnerability exists when Microsoft Hyper-V Network Switch on a host server fails to properly validate input from a privileged user on a guest operating system, aka "Windows Hyper-V Denial of Service Vulnerability." This affects Windows Server 2012 R2, Windows RT 8.1, Windows Server 2016, Windows 8.1, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8436, CVE-2018-8437.

Affected products

• Microsoft Windows 10: affected versions not specified; version 1607 only; version 1709 only; version 1803 only
• Microsoft Windows 8.1: affected versions not specified
• Microsoft Windows Server: version 2012 only
• Microsoft Windows Server 2016: affected versions not specified; version 1709 only; version 1803 only

Published 2018-09-13. Last modified 2026-06-17.