According to TheRegister.co.uk, researchers have identified a kernel-level vulnerability in Windows. This vulnerability allows attackers to gain escalated privileges and may also allow them to remotely execute malicious code. All versions of the Microsoft OS are affected, including Windows 7.
The buffer overflow, which was originally reported, can be exploited to escalate privileges or crash vulnerable machines, IT research company Vupen said. The flaw may also allow attackers to execute arbitrary code with kernel privileges.
Read more about this vulnerability here.