[$] Defending against Rowhammer in the kernel
The Rowhammer
vulnerability affects hardware at the deepest levels. It has proved to be
surprisingly exploitable on a number of different systems, leaving
security-oriented developers at a loss. Since it is a hardware
vulnerability, it would appear that solutions, too, must be placed in the
hardware. Now, though, an interesting software-based mitigation mechanism
is under discussion on the linux-kernel mailing list. The ultimate
effectiveness of this defense is unproven, but it does show that there may
be hope for a solution that doesn't require buying new computers.