Ubuntu has released security updates to address vulnerabilities in BusyBox, RMagick, .NET, Linux kernel and QEMU. Exploitation of these vulnerabilities may allow an attacker to take control of affected system.
Users and administrators are encouraged to review Ubuntu Security Advisories USN-6961-1, USN-6960-1, USN-6959-1, USN-6949-2 and USN-6954-1 and apply necessary updates.