Windows 10 KB4457128 applies to version 1803. This update brings the build up to 17134.285.
- Provides protection against a Spectre Variant 2 vulnerability (CVE-2017-5715) for ARM64 devices.
- Addresses an issue that causes the Program Compatibility Assistant (PCA) service to have excessive CPU usage. This occurs when the concurrency of two simultaneous add and remove programs (ARP) monitoring threads is not handled correctly.
- Security updates to Internet Explorer, Microsoft Edge, Microsoft scripting engine, Microsoft Graphics Component, Windows media, Windows Shell, Windows Hyper-V, Windows datacenter networking, Windows virtualization and kernel, Windows Linux, Windows kernel, Microsoft JET Database Engine, Windows MSXML, and Windows Server.
Not many other fixes were included as Microsoft is working mostly in the upcoming 1809 version of Windows which is now close to RTM.