After few weeks from the recent Intel CPU security bug, not yet closed (considering that affect also the recent Skylake family), there are new threads on the CPU. Meltdown and Spectre are critical vulnerabilities existing in several modern CPU: these hardware bugs allow programs to steal data which is currently processed on the computer. Meltdown and Spectre can affect personal computers, mobile devices, server and several cloud services. Depending by the bug, the affected CPU are Intel processors (since 1995!), some AMD CPUs, and several ARM-based Samsung and Qualcomm system-on-chips used for mobile phones.