# CVE-2019-0717: Windows Hyper-V Denial of Service Vulnerability

CVE-2019-0717 is fixed in 5 products on 1 platform, first by KB4511553, released August 13, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-0717
- Priority: Routine
- CVSS: 5.8 (Important)
- EPSS: 0.0510
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Aug 13, 2019
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-0717

## Description

<p>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. An attacker who successfully exploited the vulnerability could cause the host server 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 that causes a host machine to crash.</p> <p>The update addresses the vulnerability by modifying how virtual machines access the Hyper-V Network Switch.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.678 | [KB4511553](https://patchblox.com/security/data/fix/microsoft/kb4511553.md) | Aug 13, 2019 |
| Microsoft | Windows 10 Version 1903 for x64-based Systems | 18362.295 | [KB4512508](https://patchblox.com/security/data/fix/microsoft/kb4512508.md) | Aug 13, 2019 |
| Microsoft | Windows Server 2019 | 17763.678 | [KB4511553](https://patchblox.com/security/data/fix/microsoft/kb4511553.md) | Aug 13, 2019 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.678 | [KB4511553](https://patchblox.com/security/data/fix/microsoft/kb4511553.md) | Aug 13, 2019 |
| Microsoft | Windows Server, version 1903 (Server Core installation) | 18362.295 | [KB4512508](https://patchblox.com/security/data/fix/microsoft/kb4512508.md) | Aug 13, 2019 |

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Data as of 2026-11-07T18:46:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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