Researchers Find Way to Steal Data through Wi-Fi from a Computer with No Dedicated Wi-Fi Hardware

TLDR: They basically force DDR SDRAM busses to generate signal at 2.4GHz . Presumably means you need to gain access to the original air gapped system first to install malware somehow? Like a compromised firmware update?

https://www.bitdefender.com/box/blog/iot-news/researchers-find-way-steal-data-wi-fi-computer-no-dedicated-wi-fi-hardware