# CVE-2016-3221: Win32k Elevation of Privilege Vulnerability CVE-2016-3221 is fixed in 23 products on 1 platform, first by KB3163018, released June 14, 2016. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2016-3221 - Priority: Urgent - CVSS: n/a (Important) - EPSS: 0.0595 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation More Likely - Published: Jun 14, 2016 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2016-3221 ## Description

An elevation of privilege vulnerability exists in Windows when the Windows kernel-mode driver fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system.

The update addresses this vulnerability by correcting how the Windows kernel-mode driver handles objects in memory.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1511 for 32-bit Systems | 10586.420 | [KB3163018](https://patchblox.com/security/data/fix/microsoft/kb3163018.md) | Jun 14, 2016 | | Microsoft | Windows 10 Version 1511 for x64-based Systems | 10586.420 | [KB3163018](https://patchblox.com/security/data/fix/microsoft/kb3163018.md) | Jun 14, 2016 | | Microsoft | Windows 10 for 32-bit Systems | 10240.16942 | [KB3163017](https://patchblox.com/security/data/fix/microsoft/kb3163017.md) | Jun 14, 2016 | | Microsoft | Windows 10 for x64-based Systems | 10240.16942 | [KB3163017](https://patchblox.com/security/data/fix/microsoft/kb3163017.md) | Jun 14, 2016 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows 8.1 for x64-based systems | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows RT 8.1 | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Server 2012 | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Server 2012 R2 | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Vista Service Pack 2 | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | | Microsoft | Windows Vista x64 Edition Service Pack 2 | | [KB3161664](https://patchblox.com/security/data/fix/microsoft/kb3161664.md) | Jun 14, 2016 | --- 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