CVE-2019-0803

Win32k Elevation of Privilege Vulnerability

CVE-2019-0803 is fixed in 38 products on 1 platform, first by KB4493470, released April 9, 2019. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, with known ransomware use. Patch Radar priority: Patch now.

Patch nowCISA KEVKnown ransomware use
CVSS
7.0
Important
Exploitation
Exploited
Reported by the vendor
CISA KEV
Nov 3, 2021
Federal due date May 3, 2022. Known ransomware use
EPSS
0.4523
98th percentile

<p>An elevation of privilege vulnerability exists in Windows when the Win32k component 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.</p> <p>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.</p> <p>The update addresses this vulnerability by correcting how Win32k handles objects in memory.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Windows 10 Version 1607 for 32-bit Systems 14393.2906 KB4493470 Apr 9, 2019
Windows 10 Version 1607 for x64-based Systems 14393.2906 KB4493470 Apr 9, 2019
Windows 10 Version 1703 for 32-bit Systems 15063.1746 KB4493474 Apr 9, 2019
Windows 10 Version 1703 for x64-based Systems 15063.1746 KB4493474 Apr 9, 2019
Windows 10 Version 1709 for 32-bit Systems 16299.1087 KB4493441 Apr 9, 2019
Windows 10 Version 1709 for ARM64-based Systems 16299.1087 KB4493441 Apr 9, 2019
Windows 10 Version 1709 for x64-based Systems 16299.1087 KB4493441 Apr 9, 2019
Windows 10 Version 1803 for 32-bit Systems 17134.706 KB4493464 Apr 9, 2019
Windows 10 Version 1803 for ARM64-based Systems 17134.706 KB4493464 Apr 9, 2019
Windows 10 Version 1803 for x64-based Systems 17134.706 KB4493464 Apr 9, 2019
Windows 10 Version 1809 for 32-bit Systems 17763.437 KB4493509 Apr 9, 2019
Windows 10 Version 1809 for ARM64-based Systems 17763.437 KB4493509 Apr 9, 2019
Windows 10 Version 1809 for x64-based Systems 17763.437 KB4493509 Apr 9, 2019
Windows 10 for 32-bit Systems 10240.18186 KB4493475 Apr 9, 2019
Windows 10 for x64-based Systems 10240.18186 KB4493475 Apr 9, 2019
Windows 7 for 32-bit Systems Service Pack 1 KB4493448 Apr 9, 2019
Windows 7 for 32-bit Systems Service Pack 1 KB4493472 Apr 9, 2019
Windows 7 for x64-based Systems Service Pack 1 KB4493448 Apr 9, 2019
Windows 7 for x64-based Systems Service Pack 1 KB4493472 Apr 9, 2019
Windows 8.1 for 32-bit systems KB4493467 Apr 9, 2019
Windows 8.1 for 32-bit systems KB4493446 Apr 9, 2019
Windows 8.1 for x64-based systems KB4493467 Apr 9, 2019
Windows 8.1 for x64-based systems KB4493446 Apr 9, 2019
Windows RT 8.1 KB4493446 Apr 9, 2019
Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 KB4493448 Apr 9, 2019
Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 KB4493472 Apr 9, 2019
Windows Server 2008 R2 for x64-based Systems Service Pack 1 KB4493448 Apr 9, 2019
Windows Server 2008 R2 for x64-based Systems Service Pack 1 KB4493472 Apr 9, 2019
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) KB4493448 Apr 9, 2019
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) KB4493472 Apr 9, 2019
Windows Server 2008 for 32-bit Systems Service Pack 2 KB4493471 Apr 9, 2019
Windows Server 2008 for 32-bit Systems Service Pack 2 KB4493458 Apr 9, 2019
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) KB4493471 Apr 9, 2019
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) KB4493458 Apr 9, 2019
Windows Server 2008 for Itanium-Based Systems Service Pack 2 KB4493471 Apr 9, 2019
Windows Server 2008 for Itanium-Based Systems Service Pack 2 KB4493458 Apr 9, 2019
Windows Server 2008 for x64-based Systems Service Pack 2 KB4493471 Apr 9, 2019
Windows Server 2008 for x64-based Systems Service Pack 2 KB4493458 Apr 9, 2019
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) KB4493471 Apr 9, 2019
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) KB4493458 Apr 9, 2019
Windows Server 2012 KB4493451 Apr 9, 2019
Windows Server 2012 KB4493450 Apr 9, 2019
Windows Server 2012 (Server Core installation) KB4493451 Apr 9, 2019
Windows Server 2012 (Server Core installation) KB4493450 Apr 9, 2019
Windows Server 2012 R2 KB4493467 Apr 9, 2019
Windows Server 2012 R2 KB4493446 Apr 9, 2019
Windows Server 2012 R2 (Server Core installation) KB4493467 Apr 9, 2019
Windows Server 2012 R2 (Server Core installation) KB4493446 Apr 9, 2019
Windows Server 2016 14393.2906 KB4493470 Apr 9, 2019
Windows Server 2016 (Server Core installation) 14393.2906 KB4493470 Apr 9, 2019
Windows Server 2019 17763.437 KB4493509 Apr 9, 2019
Windows Server 2019 (Server Core installation) 17763.437 KB4493509 Apr 9, 2019
Windows Server, version 1709 (Server Core Installation) 16299.1087 KB4493441 Apr 9, 2019
Windows Server, version 1803 (Server Core Installation) 17134.706 KB4493464 Apr 9, 2019