@conservancy General Counsel Rick Sanders just released a blog post about the recent bans of Russian contributors in the Linux project. See his take on the situation and how it applies to your FOSS project: 

Software Freedom Conservancy
Linux banned Russian contributors. Does my FOSS project need to worry about U.S. Sanctions?
Since the Linux project removed a number of entries from the MAINTAINERS ο¬le, all of whom
were putatively Russian, in October, we