Windows PatchGuard Protection is bypassed by GhostHook

Is there any possible method to bypass Windows PatchGuard protection? Well, the latest researches say that this is possible. The malicious code can be executed in the Windows Kernal after bypassing the PatchGuard and thus this allows the cyber-crooks to install rootkits on System. Earlier the Kernal Patch Protection was considered as invulnerable and it was trusted to block the third-party code from patching the Windows Kernel.