The security researcher John Gordon has found an easy way to unlock smartphones running Android 5.0 and 5.1 (Build LMY48M) Google has already released a patch for its Nexus devices. The vulnerability dubbed as Elevation of Privilege Vulnerability in Lockscreen has been coded as CVE-2015-3860. The operation causes the crash of the user interface for the password screen and open the doors of the device. The Android user will notice the soft buttons (home and back button) at the bottom of the screen will disappear when the camera app is going to become unresponsive.”]
Source: https://securityaffairs.co/wordpress/40182/hacking/android-5-hack.html