vsdatant.sys 6.5.737.0 in Check Point Zone Labs ZoneAlarm before 7.0.362 allows local users to gain privileges via a crafted Interrupt Request Packet (Irp) in a METHODNEITHER (1) IOCTL 0x8400000F or (2) IOCTL 0x84000013 request, which can be used to overwrite arbitrary memory locations.
The IOCTL handling in srescan.sys in the ZoneAlarm Spyware Removal Engine (SRE) in Check Point ZoneAlarm before 5.0.156.0 allows local users to execute arbitrary code via certain IOCTL lrp parameter addresses.