The new Spectre variant apparently has no effect on AMD's processors, yet it continues to affect Intel's processors ranging from Haswell up to Alder Lake, whereas ARM's affected products include the Cortex A15 / A57 / A72 cores plus Neoverse server-grade processors models V1, N1 and N2.
https://www.notebookcheck.net/New-Spectre-vulnerability-affects-Intel-Alder-Lake-and-ARM-processors.607155.0.html