[$] An unexpected perf feature
Local privilege escalations seem to be regularly found in the Linux kernel these days, but they usually aren't quite so old—more than two years since the release of 2.6.37—or backported into even earlier kernels. But CVE-2013-2094 is just that kind of bug, with a now-public exploit that apparently dates back to 2010.

Click below (subscribers only) for LWN's look at this vulnerability.