# CVE-2019-0701: Windows Hyper-V Denial of Service Vulnerability

CVE-2019-0701 is fixed in 5 products on 1 platform, first by KB4489868, released March 12, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-0701
- Priority: Routine
- CVSS: 6.8 (Important)
- EPSS: 0.0190
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Mar 12, 2019
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-0701

## Description

<p>A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate input from a privileged user on a guest operating system. To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application that causes a host machine to crash.</p> <p>To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application.</p> <p>The security update addresses the vulnerability by resolving a number of conditions where Hyper-V would fail to prevent a guest operating system from sending malicious requests.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.648 | [KB4489868](https://patchblox.com/security/data/fix/microsoft/kb4489868.md) | Mar 12, 2019 |
| Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.379 | [KB4489899](https://patchblox.com/security/data/fix/microsoft/kb4489899.md) | Mar 12, 2019 |
| Microsoft | Windows Server 2019 | 17763.379 | [KB4489899](https://patchblox.com/security/data/fix/microsoft/kb4489899.md) | Mar 12, 2019 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.379 | [KB4489899](https://patchblox.com/security/data/fix/microsoft/kb4489899.md) | Mar 12, 2019 |
| Microsoft | Windows Server, version 1803  (Server Core Installation) | 17134.648 | [KB4489868](https://patchblox.com/security/data/fix/microsoft/kb4489868.md) | Mar 12, 2019 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo