ApMsgFwd.exe belonging to Dell Touchpad, ALPS Touchpad driver, ALPS pointing-device for VAIO, Thinkpad Ultranav Driver ..etc allows the current user to map and write to the 'ApMsgFwd File Mapping Object' section. ApMsgFwd.exe uses the data written to the section as arguments to functions. This causes a denial of service condition when invalid pointers are written to the mapped section.