Ubuntu has released security updates to address vulnerabilities in libxml, sysstat, netatalk, SpiderMonkey, Linux kernel, LibreOffice and Firefox. Exploitation of these vulnerabilities may allow an attacker to take control of affected system.
Users and administrators are encouraged to review Ubuntu Security AdvisoriesUSN-6028-2, USN-6145-1, USN-6146-1, USN-6147-1, USN-6150-1, USN-6144-1 and USN-6143-1 and apply necessary updates.