https://www.bleepingcomputer.com/news/microsoft/microsoft-surface-laptop-and-surface-pro-4-getting-new-firmware-updates/

Microsoft has started shipping firmware updates for Surface Laptop and Surface Pro 4 devices that run the Windows 10 Fall Creators Update or the Windows 10 April 2018 Update.

The new firmware brings updates to drivers, such as improvements and fixes. These updates also include security fixes for vulnerabilities detailed in the ADV180012 and ADV180013 security advisories.