K7Sentry.sys in K7 Computing Ultimate Security, Anti-Virus Plus, and Total Security before 14.2.0.253 allows local users to write to arbitrary memory locations, and consequently gain privileges, via a crafted 0x95002570, 0x95002574, 0x95002580, 0x950025a8, 0x950025ac, or 0x950025c8 IOCTL call.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2014-9453
http://www.greyhathacker.net/?p=818
http://www.exploit-db.com/exploits/35992
http://packetstormsecurity.com/files/130246/K7-Computing-14.2.0.240-Privilege-Escalation.html