# CVE-2016-0181: Hypervisor Code Integrity Security Feature Bypass

CVE-2016-0181 is fixed in 4 products on 1 platform, first by KB3156421, released May 10, 2016. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2016-0181
- Priority: High
- CVSS: n/a (Important)
- EPSS: 0.0152
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Unlikely
- Published: May 10, 2016
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2016-0181

## Description

<p>A security feature bypass vulnerability exists when Windows incorrectly allows certain kernel-mode pages to be marked as Read, Write, Execute (RWX) even with <a href="https://technet.microsoft.com/en-us/library/security/dn848375.aspx#HVCI">Hypervisor Code Integrity (HVCI)</a> enabled.</p> <p>To exploit this vulnerability, an attacker could run a specially crafted application to bypass code integrity protections in Windows.</p> <p>The security update addresses the vulnerability by correcting security feature behavior to preclude the incorrect marking of RWX pages under HVCI.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1511 for 32-bit Systems | 10586.318 | [KB3156421](https://patchblox.com/security/data/fix/microsoft/kb3156421.md) | May 10, 2016 |
| Microsoft | Windows 10 Version 1511 for x64-based Systems | 10586.318 | [KB3156421](https://patchblox.com/security/data/fix/microsoft/kb3156421.md) | May 10, 2016 |
| Microsoft | Windows 10 for 32-bit Systems | 10240.16854 | [KB3156387](https://patchblox.com/security/data/fix/microsoft/kb3156387.md) | May 10, 2016 |
| Microsoft | Windows 10 for x64-based Systems | 10240.16854 | [KB3156387](https://patchblox.com/security/data/fix/microsoft/kb3156387.md) | May 10, 2016 |

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Data as of 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo