While years ago it was hard envisioning Microsoft contributing significantly to the Linux kernel or Mesa 3D graphics driver stack, maintaining its own in-house Linux distribution, or publishing so much open-source software, these days it's par for the course thanks to Windows Subsystem for Linux (WSL), Linux dominating Azure instances, etc
Several months back was work to disable all Microsoft Remote Network Driver Interface Specification (RNDIS) drivers in the Linux kernel on the basis of being insecure and other factors