AppArmor

From Bibliotheca Anonoma

Apparmor is an uncomplicated way to restrict the capabilities of vulnerable programs on a Linux server. If the program ever gets exploited, it would be limited in it's ability to damage other data.

http://apparmor.451f.org/2015/03/05/so-how-usable-is-apparmor-in-debian/

https://wiki.debian.org/AppArmor