The present disclosure describes a number of embodiments related to devices, systems, and methods directed to a verification manager to receive an indicator of a memory page having instructions to be executed by the one or more processors, determine whether the indicator indicates the memory page has been updated, verify integrity of the instructions, in response to a result of the determination indicating the memory page has been updated, and allow or disallow execution of the instructions, based at least in part on a result of the integrity verification.