out of bounds array read/writes could cause issues on any platform but surely all that can occur is that you corrupt video memory & potentially lock up a shader as a result ? a timeout in a faulty shader would close this security hole. a shader malfunction message could then be generated.
I give a fuck.
If there is a security hole, it's unlikely to be limited to Linux (or is it ? - waiting for details)
There are still a lot of IE users out there so support on that platform would help build the business case for WebGL content.
Switching browsers is an option if it's a secure solution.
The Tao is like a glob pattern: used but never used up. It is like the extern void: filled with infinite possibilities.