Buffer overflow in kavfm.sys in Kingsoft Antivirus 2010.04.26.648 and earlier allows local users to execute arbitrary code via a long argument to IOCTL 0x80030004. NOTE: some of these details are obtained from third party information.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6650