What is the purpose of an execute disable bit?

The execute disable bit (XD bit) is a security feature found in modern processors that helps prevent the execution of malicious code in certain areas of memory. By marking specific memory regions as non-executable, it mitigates the risk of buffer overflow attacks and other exploits that attempt to execute code from data sections. This hardware-enforced protection enhances the overall security of the system by restricting the execution of potentially harmful code.