# CVE-2019-1044: Windows Secure Kernel Mode Security Feature Bypass Vulnerability

CVE-2019-1044 is fixed in 5 products on 1 platform, first by KB4503327, released June 11, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-1044
- Priority: Routine
- CVSS: 5.3 (Important)
- EPSS: 0.0106
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: N/A
- Published: Jun 11, 2019
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1044

## Description

<p>A security feature bypass vulnerability exists when Windows Secure Kernel Mode fails to properly handle objects in memory.</p> <p>To exploit the vulnerability, a locally-authenticated attacker could attempt to run a specially crafted application on a targeted system. An attacker who successfully exploited the vulnerability could violate virtual trust levels (VTL).</p> <p>The update addresses the vulnerability by correcting how Windows Secure Kernel Mode handles objects in memory to properly enforce VTLs.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.557 | [KB4503327](https://patchblox.com/security/data/fix/microsoft/kb4503327.md) | Jun 11, 2019 |
| Microsoft | Windows 10 Version 1809 for ARM64-based Systems | 17763.557 | [KB4503327](https://patchblox.com/security/data/fix/microsoft/kb4503327.md) | Jun 11, 2019 |
| Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.557 | [KB4503327](https://patchblox.com/security/data/fix/microsoft/kb4503327.md) | Jun 11, 2019 |
| Microsoft | Windows Server 2019 | 17763.557 | [KB4503327](https://patchblox.com/security/data/fix/microsoft/kb4503327.md) | Jun 11, 2019 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.557 | [KB4503327](https://patchblox.com/security/data/fix/microsoft/kb4503327.md) | Jun 11, 2019 |

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Data as of 2026-11-12T01:51:14Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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