Intel GDS/Downfall Linux Mitigation Updated To Confirm All Skylake CPUs Are Affected

The Linux mitigation for the Intel Gather Data Sampling (GDS) "Downfall" vulnerability was updated to reflect all Skylake and Kabylake CPUs being vulnerable to this nasty issue. Due to those Skylake client processors reaching the end of their official support life at Intel, the original Linux mitigation for GDS/Downfall didn't properly protect those older Core processor models...