tl;dr: Security concerns for my Linux partition, when running Vanguard on Windows?

Now that Vanguard is out, I can’t play LoL on Linux anymore. I’m running a dual boot setup with windows and I’m using it only for stuff I can’t get to work on Linux, so there is no personal data on there.

• Are there any security risks for my Linux partition, if Vanguard is installed and running on my Linux partition?
• Could Vanguard potentially access my ext4 Linux file system via Windows?
• If my NAS is mounted on Windows, could that also be a security concern?

I’m grateful for any kind of feedback, since I’m not very informed in terms of rootkits and kernels!