ProcessGuard 3.410 does not properly validate certain parameters to System Service Descriptor Table (SSDT) function handlers, which allows local users to cause a denial of service (crash) and possibly gain privileges via kernel SSDT hooks for Windows Native API functions including (1) NtCreateFile, (2) NtCreateKey, (3) NtDeleteValueKey, (4) NtOpenFile, (5) NtOpenKey, and (6) NtSetValueKey.