1.Penguin Landscape

With the next Linux kernel cycle we could see upstream disable their driver support for Microsoft's Remote Network Driver Interface Specification (RNDIS) protocol due to security concerns.

RNDIS is the proprietary protocol used atop USB for virtual Ethernet functionality. The support for RNDIS outside of Microsoft Windows has been mixed.

RNDIS isn't widely used today in cross-platform environments and due to security concerns the upstream Linux kernel is looking to move the RNDIS kernel drivers behind the "BROKEN" Kconfig option so they effectively become disabled in future kernel builds.

Ultimately once marked as "BROKEN" for a while, the drivers will likely be eventually removed from the upstream source tree.