As mentioned earlier, I've done my share of ... um, looking for flaws in design of operating systems back when I was in college. (What, 1976?)
We discovered some bad flaws in the design of the <redacted>. How long had the Univac been around? I don't know, but a while. Unless someone with WAY too much time on their hands is actively seeking ways around stuff, there's only so much 'bug' you can find. (and, actually, you really need more than one person involved (partially so someone can ask the 'right' stupid question :-))
Doesn't take malice or sloppiness, and I will say being a publicly-traded company makes it very hard to spend the time required to even start on the hacking required (Being publically-traded makes your owner effectively insane, since your owner is actually many people, all with different and often diametrically opposing goals for the company).
Anyway, tell you what - go read the Intel hardware docs and see if you can find the info needed to put together to see the bug. And this with prior knowledge of where to look.
I will say that this doesn't excuse much, but realize that being a public company drives you insane ;-)