It could be. Who knows. What I do know is that Chrome & ChromeOS have got some of the most diligent security-minded hackers in the world working on them. I get occasional updates on the stuff they are doing to make Chrome secure. Things like the sandbox, SPDY, HSTS and more. This sort of thing will just motivate them to work smarter & harder.
I get your point. However, this isn't a fix, it is, according to the article, a volunerability that allows "remote execution of malicious code". People who know WebGL better than I do would probably know more about what specific exploits it facilitates.