There's very little that GPUs can do that CPUs can't do so far as exploitation is concerned. The GPU driver runs in a sandboxed userland process just like the b

There's very little that GPUs can do that CPUs can't do so far as exploitation is concerned. The GPU driver runs in a sandboxed userland process just like the browser engine does, and the GPU respects process isolation just like the CPU does. There is no “bare metal” here! Now, sure, there must be plenty of memory-safety issues in GPU drivers, but why find an exploit in a driver only some users have installed, when you can find an exploit in the browser everyone has installed? The GPU driver exploit doesn't give you higher privileges.