That is about the X server, which is not some Linux specific component as it is also used by all the other *nixes as well. There is Wayland which aims to solve

That is about the X server, which is not some Linux specific component as it is also used by all the other *nixes as well. There is Wayland which aims to solve these security aspects mentioned in the blog post, it will be shipping by default in the next Fedora release IIRC.