KisKrnl.sys 2011.1.13.89 and earlier in Kingsoft AntiVirus 2011 SP5.2 allows local users to cause a denial of service (crash) via a crafted request that is not properly handled by the KiFastCallEntry hook.
Heap-based buffer overflow in the KUpdateObj2 Class ActiveX control in UpdateOcx2.dll in Beijing KingSoft Antivirus Online Update Module 2007.12.29.29 allows remote attackers to execute arbitrary code via a long argument to the SetUninstallName method.