As of this moment, there are no KB articles for any of the three patches, and the Windows Update master list has not been updated. Presumably we'll get some sort of description in the next day or two, even if it's just the "This update includes improvements to enhance the functionality of Windows 10" variety.
There's a Reddit thread on the three patches, but no information yet.
Poster aberg on Neowin says
I'm opening up an AskWoody post for comments. Please drop by and let me know what you find.
Woody Leonhard