Vulnerabilities are affected by all computers with a Thunderbolt controller released before 2019. Last year, Intel, the main interface developer, implemented the Kernel DMA Protection method, which makes an attack impossible. The introduction of this layer of protection requires hardware changes and is therefore only available in devices released recently, and not all.
The researcher did not find fresh Dell laptops with Kernel DMA Protection, although Lenovo and HP laptops that were also released last year use this system. The potential damage from any vulnerabilities that require physical access to the hardware is small, but the story has developed (not very) beautiful. After all, it cannot be said that until 2019 Thunderbolt protection systems were not in the devices. Ryutenberg’s work showed that they do not always work.