TunnelVision appears to work on any operating system that has a DHCP client that implements support for DHCP option 121. Most modern operating systems support this such as Linux, Windows, iOS and MacOS. Notably, Android does not appear to have support for option 121 and remains unaffected.
A fix is available on Linux when configuring the VPN users host to utilize network namespaces.
I read the Arstechnica article too where they say Linux isn't affected then link to the researchers video where they show Linux being affected...