This paper provides an overview of a new hardware security feature introduced by Intel and covers its support on Windows 8. Among the other common features it complicates vulnerability exploitation on a target system. But if these features are not properly configured all of them may become useless. This paper demonstrates a security flaw on x86 version of Windows 8 leading to a bypass of the SMEP security feature.
You can download it from the following link: https://packetstormsecurity.com/files/download/116618/SMEP_overview_and_partial_bypass_on_Windows_8.pdf
Source: https://packetstormsecurity.com/files/116618/Intel-SMEP-Overview-And-Partial-Bypass-On-Windows-8.html