Dirty COW (CVE-2016-5195) is the latest vulnerability to be given a brand and is being dubbed the biggest privilege escalation vulnerability to date on Linux.
https://dirtycow.ninja/
The reason for all the hype is because of the amount of devices the vulnerability affects as it has been in the linux kernel since 2.6.22 (2007) and is easily exploitable reliably. That’s enough of the background info, follow the link above if you want to learn more.