CODE LOADING HARDENING BY HYPERVISOR PAGE TABLE SWITCHING

Systems and methods are provided for modifying one or more guest memory permissions. An example method includes receiving a request to modify a memory permission of a guest running on a virtual machine. The guest includes a kernel that includes loading code and kernel code. The method also includes determining whether the request was sent from the loading code. The loading code corresponds to a first set of hypervisor page tables and is stored at a first range of memory addresses, and the kernel code corresponds to a second set of hypervisor page tables. The first range of memory addresses is in an executable mode in the first set of hypervisor page tables. The method further includes in response to a determination that the request was sent from the loading code, modifying the guest's memory permission in the second set of hypervisor page tables in accordance with the request.