aavmker4.sys in avast! Home and Professional 4.7 for Windows does not properly validate input to IOCTL 0xb2d60030, which allows local users to gain privileges via certain IOCTL requests.
secunia.com/advisories/29605
www.avast.com/eng/avast-4-home_pro-revision-history.html
www.securityfocus.com/archive/1/490321/100/0/threaded
www.securityfocus.com/bid/28502
www.securitytracker.com/id?1019732
www.trapkit.de/advisories/TKADV2008-002.txt
www.vupen.com/english/advisories/2008/1034/references
exchange.xforce.ibmcloud.com/vulnerabilities/41527