Quote:The May 2019 Patch Tuesday cycle brought new monthly rollups for Windows 7 and 8.1 devices, along with security-only updates that do not include any non-security fixes.
 
The Windows 7 monthly rollup is KB4499164, while the security-only update is KB4499175.
 
As per the official changelog, the Windows 7 update comes with a series of improvements, including patches for the Microarchitectural Data Sampling (MDS) flaw that was recently discovered. You can read more about this flaw in this article.
 
Additionally, the patch also resolves issues hitting Microsoft Excel when using certain fonts, as well as a bug preventing Visual Studio Simulator from starting.

The Windows 8.1 monthly rollup is  KB4499151, and it comes alongside security-only update KB4499165.
 
The same security patch for the MDS security vulnerability is included here, along with fixes for Error 1309 when installing MSI and MSP files on a virtual drive. Microsoft says it has also added uk.gov into the HTTP Strict Transport Security Top Level Domains (HSTS TLD) for its two current browsers, namely Internet Explorer and Microsoft Edge.