How are GNU Hurd, Minix, and other microkernel systems affected by these issues? I would expect that they would have less sensitive information in kernel memory, and so exploits to read kernel memory would not be as dangerous as on systems with a monolithic kernel.
It's not so much about sensitive info residing in the kernel, but that the kernel has an identity mapping of the entire physical memory, Thus if you can read kernel memory, you can dump all ram, where secrets from other processes or virtual guests reside.
I don't know if Minix or Hurd maps all of ram into the kernel address space though (or if they add the kernel address space to each user space processes , as the exploit also requires)
