Any links/info on people making them? I was just looking for some, and didn't find any reports of such things in a few minutes of looking. Seems like the overall field is light, partly because there isn't any large company to pay out rewards for exploits, the huge variety of distros in the installed base, and the weak ecosystem as a result of the previous two.

There probably are plenty of holes, but they might be only found by big-money efforts aimed at compromising particular computers, meaning essentially government spying.