# CVE-2019-0723: Windows Hyper-V Denial of Service Vulnerability CVE-2019-0723 is fixed in 21 products on 1 platform, first by KB4512517, released August 13, 2019. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2019-0723 - Priority: Routine - CVSS: 5.8 (Important) - EPSS: 0.0500 - 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-2019-0723 ## Description

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.

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.

The update addresses the vulnerability by modifying how virtual machines access the Hyper-V Network Switch.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.3144 | [KB4512517](https://patchblox.com/security/data/fix/microsoft/kb4512517.md) | Aug 13, 2019 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1988 | [KB4512507](https://patchblox.com/security/data/fix/microsoft/kb4512507.md) | Aug 13, 2019 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.1331 | [KB4512516](https://patchblox.com/security/data/fix/microsoft/kb4512516.md) | Aug 13, 2019 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.950 | [KB4512501](https://patchblox.com/security/data/fix/microsoft/kb4512501.md) | Aug 13, 2019 | | 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 10 for x64-based Systems | 10240.18305 | [KB4512497](https://patchblox.com/security/data/fix/microsoft/kb4512497.md) | Aug 13, 2019 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4512506](https://patchblox.com/security/data/fix/microsoft/kb4512506.md) | Aug 13, 2019 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4512486](https://patchblox.com/security/data/fix/microsoft/kb4512486.md) | Aug 13, 2019 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4512488](https://patchblox.com/security/data/fix/microsoft/kb4512488.md) | Aug 13, 2019 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4512489](https://patchblox.com/security/data/fix/microsoft/kb4512489.md) | Aug 13, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4512506](https://patchblox.com/security/data/fix/microsoft/kb4512506.md) | Aug 13, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4512486](https://patchblox.com/security/data/fix/microsoft/kb4512486.md) | Aug 13, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4512506](https://patchblox.com/security/data/fix/microsoft/kb4512506.md) | Aug 13, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4512486](https://patchblox.com/security/data/fix/microsoft/kb4512486.md) | Aug 13, 2019 | | Microsoft | Windows Server 2012 | | [KB4512482](https://patchblox.com/security/data/fix/microsoft/kb4512482.md) | Aug 13, 2019 | | Microsoft | Windows Server 2012 | | [KB4512518](https://patchblox.com/security/data/fix/microsoft/kb4512518.md) | Aug 13, 2019 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4512482](https://patchblox.com/security/data/fix/microsoft/kb4512482.md) | Aug 13, 2019 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4512518](https://patchblox.com/security/data/fix/microsoft/kb4512518.md) | Aug 13, 2019 | | Microsoft | Windows Server 2012 R2 | | [KB4512488](https://patchblox.com/security/data/fix/microsoft/kb4512488.md) | Aug 13, 2019 | | Microsoft | Windows Server 2012 R2 | | [KB4512489](https://patchblox.com/security/data/fix/microsoft/kb4512489.md) | Aug 13, 2019 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4512488](https://patchblox.com/security/data/fix/microsoft/kb4512488.md) | Aug 13, 2019 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4512489](https://patchblox.com/security/data/fix/microsoft/kb4512489.md) | Aug 13, 2019 | | Microsoft | Windows Server 2016 | 14393.3144 | [KB4512517](https://patchblox.com/security/data/fix/microsoft/kb4512517.md) | Aug 13, 2019 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.3144 | [KB4512517](https://patchblox.com/security/data/fix/microsoft/kb4512517.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 1803 (Server Core Installation) | 17134.950 | [KB4512501](https://patchblox.com/security/data/fix/microsoft/kb4512501.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 | --- 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 Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.