"Plundervolt – Stealing Secrets by Starving Your Computer of Voltage"

Researchers discovered a new vulnerability, and are calling it Plundervolt.  The vulnerability is caused by an individual running a processor on a voltage that’s a little bit lower than it usually expects, for example, 0.9V instead of 1.0V. The machine may carry on working almost as usual but will get some calculations very slightly wrong. The undervoltages required varied by CPU type, model number, and operating frequency, so they were found by trial and error. This vulnerability might let one pull off a hack, but the chances are slim. There is a patch to this vulnerability. A BIOS update turns off access to the processor instruction used to produce undervoltages, thus stopping any software, including code inside the kernel, from fiddling with your CPU voltage while the system is running. 

Naked Security reports: "Plundervolt – Stealing Secrets by Starving Your Computer of Voltage"