Unrated severityCISA KEVNVD Advisory· Published Dec 12, 2018· Updated Oct 21, 2025

CVE-2018-8639

Description

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8641.

Affected products

Microsoft/Windowsllm-fuzzy
Microsoft/Windows 10 1909cpe-rescue
Range: 32-bit Systems
Microsoft/Windows Server 2003cpe-rescue
Range: version 1709 (Server Core Installation)
Microsoft/Windows 7cpe-rescue
Range: 32-bit Systems Service Pack 1
Microsoft/Windows 8.1cpe-rescue
Range: 32-bit systems
Microsoft/Windows Rt 8.1cpe-rescue
Range: Windows RT 8.1
Microsoft/Windows Server 2008cpe-rescue2 versions
32-bit Systems Service Pack 2+ 1 more
- (no CPE)range: 32-bit Systems Service Pack 2
- (no CPE)range: Itanium-Based Systems Service Pack 1
Microsoft/Windows Server 2012cpe-rescue2 versions
(Server Core installation)+ 1 more
- (no CPE)range: (Server Core installation)
- (no CPE)range: (Server Core installation)
Microsoft/Windows Server 2016cpe-rescue
Range: (Server Core installation)
Microsoft/Windows Server 2019cpe-rescue
Range: (Server Core installation)

Patches

Vulnerability mechanics

References

www.securityfocus.com/bid/106093mitrevdb-entryx_refsource_BID
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8639mitrex_refsource_CONFIRM

News mentions

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