# CVE-2018-8406: DirectX Graphics Kernel Elevation of Privilege Vulnerability

CVE-2018-8406 is fixed in 14 products on 1 platform, first by KB4343887, released August 14, 2018. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on March 28, 2022, with known ransomware use. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/cve/CVE-2018-8406
- Priority: Patch now
- CVSS: 7.0 (Important)
- EPSS: 0.0344
- CISA KEV: listed Mar 28, 2022, federal due date Apr 18, 2022, known ransomware use
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation More Likely
- Published: Aug 14, 2018
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8406

## Description

<p>An elevation of privilege vulnerability exists when the DirectX Graphics Kernel (DXGKRNL) driver improperly handles objects in memory. An attacker who successfully exploited this vulnerability could run processes in an elevated context.</p> <p>To exploit the vulnerability, an attacker would first have to log on to the system, and then run a specially crafted application to take control over the affected system.</p> <p>The security update addresses the vulnerability by correcting how DXGKRNL handles objects in memory.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.2430 | [KB4343887](https://patchblox.com/security/data/fix/microsoft/kb4343887.md) | Aug 14, 2018 |
| Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.2430 | [KB4343887](https://patchblox.com/security/data/fix/microsoft/kb4343887.md) | Aug 14, 2018 |
| Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.1266 | [KB4343885](https://patchblox.com/security/data/fix/microsoft/kb4343885.md) | Aug 14, 2018 |
| Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1266 | [KB4343885](https://patchblox.com/security/data/fix/microsoft/kb4343885.md) | Aug 14, 2018 |
| Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.611 | [KB4343897](https://patchblox.com/security/data/fix/microsoft/kb4343897.md) | Aug 14, 2018 |
| Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.611 | [KB4343897](https://patchblox.com/security/data/fix/microsoft/kb4343897.md) | Aug 14, 2018 |
| Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.228 | [KB4343909](https://patchblox.com/security/data/fix/microsoft/kb4343909.md) | Aug 14, 2018 |
| Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.228 | [KB4343909](https://patchblox.com/security/data/fix/microsoft/kb4343909.md) | Aug 14, 2018 |
| Microsoft | Windows 10 for 32-bit Systems | 10240.17946 | [KB4343892](https://patchblox.com/security/data/fix/microsoft/kb4343892.md) | Aug 14, 2018 |
| Microsoft | Windows 10 for x64-based Systems | 10240.17946 | [KB4343892](https://patchblox.com/security/data/fix/microsoft/kb4343892.md) | Aug 14, 2018 |
| Microsoft | Windows Server 2016 | 14393.2430 | [KB4343887](https://patchblox.com/security/data/fix/microsoft/kb4343887.md) | Aug 14, 2018 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.2430 | [KB4343887](https://patchblox.com/security/data/fix/microsoft/kb4343887.md) | Aug 14, 2018 |
| Microsoft | Windows Server, version 1709  (Server Core Installation) | 16299.611 | [KB4343897](https://patchblox.com/security/data/fix/microsoft/kb4343897.md) | Aug 14, 2018 |
| Microsoft | Windows Server, version 1803  (Server Core Installation) | 17134.228 | [KB4343909](https://patchblox.com/security/data/fix/microsoft/kb4343909.md) | Aug 14, 2018 |

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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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