# CVE-2019-0886: Windows Hyper-V Information Disclosure Vulnerability

CVE-2019-0886 is fixed in 12 products on 1 platform, first by KB4494440, released May 14, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-0886
- Priority: Routine
- CVSS: 5.5 (Important)
- EPSS: 0.0172
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: May 14, 2019
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-0886

## Description

<p>An information disclosure vulnerability exists when Windows Hyper-V on a host operating system fails to properly validate input from an authenticated user on a guest operating system. To exploit the vulnerability, an attacker on a guest operating system could run a specially crafted application that could cause the Hyper-V host operating system to disclose memory information.</p> <p>An attacker who successfully exploited the vulnerability could gain access to information on the Hyper-V host operating system.</p> <p>The security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.2969 | [KB4494440](https://patchblox.com/security/data/fix/microsoft/kb4494440.md) | May 14, 2019 |
| Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1805 | [KB4499181](https://patchblox.com/security/data/fix/microsoft/kb4499181.md) | May 14, 2019 |
| Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.1146 | [KB4499179](https://patchblox.com/security/data/fix/microsoft/kb4499179.md) | May 14, 2019 |
| Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.765 | [KB4499167](https://patchblox.com/security/data/fix/microsoft/kb4499167.md) | May 14, 2019 |
| Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.503 | [KB4494441](https://patchblox.com/security/data/fix/microsoft/kb4494441.md) | May 14, 2019 |
| Microsoft | Windows 10 Version 1903 for x64-based Systems |  | [KB4497936](https://patchblox.com/security/data/fix/microsoft/kb4497936.md) | May 14, 2019 |
| Microsoft | Windows Server 2016 | 14393.2969 | [KB4494440](https://patchblox.com/security/data/fix/microsoft/kb4494440.md) | May 14, 2019 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.2969 | [KB4494440](https://patchblox.com/security/data/fix/microsoft/kb4494440.md) | May 14, 2019 |
| Microsoft | Windows Server 2019 | 17763.503 | [KB4494441](https://patchblox.com/security/data/fix/microsoft/kb4494441.md) | May 14, 2019 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.503 | [KB4494441](https://patchblox.com/security/data/fix/microsoft/kb4494441.md) | May 14, 2019 |
| Microsoft | Windows Server, version 1803  (Server Core Installation) | 17134.765 | [KB4499167](https://patchblox.com/security/data/fix/microsoft/kb4499167.md) | May 14, 2019 |
| Microsoft | Windows Server, version 1903 (Server Core installation) |  | [KB4497936](https://patchblox.com/security/data/fix/microsoft/kb4497936.md) | May 14, 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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