According to this list, it seems that the Core series and later are affected (starting with the 45mm i series).
My desktop has the i7 6700K on the MSI Gaming M3 Z170a motherboard which I am expecting a firmware update. However, my laptop is 5 years old running an i5 3317u and is no longer getting driver and bios updates. Also my old system is a Q9400 (did not see any Core 2 cpus on the list).
Does this mean the Core 2 Duo and Quad are OK or are they also affected and will not get the patch?
I guess this means my laptop and old desktop are just as unsafe as running a desktop with Windows XP?