I wonder if this is related to US Feds wanting to keep certain zero-day exploits undisclosed for their own purposes. This is something that has happened a few times already. NSA and the like will maintain silence on exploits they use on targets, or even force implementation of backdoors via quasi-legal means.
There’s almost no reason to trust closed-source non-free software anymore really, especially from US-aligned corps.
Capitalist insulin manufacturers:
Chinese scientists: