Patch your Nexus - versions 4.4.4, 5.0.2, 5.1.1, 6.0 and 6.0.1.

Like they say "The ball is in your court".
Let's not procrastrinate

SUMMARY
Google has patched a vulnerability being exploited in the wild to root Nexus 5 Android devices

The elevation of privilege bug exploited by the rooting application

Rooting applications are particularly dangerous because they give their respective payloads system-level persistence.


“It allows for consistent elevation of privilege, so anyone with malicious intentions with code execution already on a device and wants higher code execution, could use it to get access to the microphone or camera, or read email, anything like that,”

Check here for more info:
https://threatpost.com/google-patches-old-flaw-exploited-by-rooting-application/117161/