May 14, 2019 - KB4499165 (Security-only update)
Applies to: Windows 8.1, Windows Server 2012 R2
Improvements and fixes
This security update includes quality improvements. Key changes include:
For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.
- Provides protections against a new subclass of speculative execution side-channel vulnerabilities, known as Microarchitectural Data Sampling, for 64-Bit (x64) versions of Windows (CVE-2018-11091,CVE-2018-12126, CVE-2018-12127, CVE-2018-12130). Use the registry settings as described in the Windows Client and Windows Server articles. (These registry settings are enabled by default for Windows Client OS editions, but disabled by default for Windows Server OS editions).
- Security updates to Windows App Platform and Frameworks, Microsoft Graphics Component, Windows Storage and Filesystems, Windows Cryptography, Windows Datacenter Networking, Windows Wireless Networking, Windows Kernel, and the Microsoft JET Database Engine.
Known issues in this update
How to get this update
This update is now available for installation through WSUS.
To get the standalone package for this update, go to the Microsoft Update Catalog website.
Source: https://support.microsoft.com/en-us/help/4499165
Direct download links for KB4499165 MSU file from Microsoft Update Catalog:
Download KB4499165 MSU for Windows 8.1 32-bit (x86) - 112.7 MBDownload KB4499165 MSU for Windows 8.1 64-bit (x64) - 137.0 MB