September 11, 2018—KB4458010 (Monthly Rollup)

Improvements and fixes

This security update addresses the following issues:

• Provides protections against a new speculative execution side-channel vulnerability known as L1 Terminal Fault (L1TF) that affects Intel® Core® processors and Intel® Xeon® processors (CVE-2018-3620 and CVE-2018-3646). Make sure that previous OS protections against Spectre Variant 2 and Meltdown vulnerabilities are enabled using the registry settings outlined in the Windows Client and Windows Server guidance KB articles. (These registry settings are enabled by default for Windows Client OS editions, but disabled by default for Windows Server OS editions.).
• Security updates Windows media, Windows Shell, Windows kernel, Windows datacenter networking, Windows virtualization and kernel, Microsoft JET Database Engine, Windows MSXML, and Windows Server.
  For more information about the resolved security vulnerabilities, see the Security Update Guide.

Known issues in this update

How to get this update

This update will be downloaded and installed automatically from Windows Update. To get the standalone package for this update, go to the Microsoft Update Catalog website.File informationFor a list of files provided in this update, download the file information for update 4458010.