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PaX is an implementation of non-executable pages for IA-32 processors (i.e. pages which user mode code can read or write, but cannot execute code in). Since the processor's native page table/directory entry format has no provision for such a feature, it is a non-trivial task. The project was designed to provide Linux with protection from buffer overflows. Making parts of the memory pages read/write access enabled, but not executable provides the protection.

PaX is an implementation of non-executable pages for IA-32 processors (i.e. pages which user mode code can read or write, but cannot execute code in). Since the processor's native page table/directory entry format has no provision for such a feature, it is a non-trivial task. The project was designed to provide Linux with protection from buffer overflows. Making parts of the memory pages read/write access enabled, but not executable provides the protection.