The Dirty Cow bug was originally introduced nine years ago, and has been sitting unnoticed for much of that time. The open-source Linux operating system is used by most of the servers on the internet as well as in smartphones. An exploit taking advantage of Dirty Cow has already been found in the wild. An unprivileged, local user could use this flaw to gain write access to otherwise read-only memory mappings and thus increase their privileges on the system. The Linux team is the expert in fixing it properly so the fixed version or newer should be used.”]