Google security researchers Matteo Rizzo and Andy Nguyen have published details of a significantly improved exploit for the Retbleed CPU vulnerability that can steal sensitive data from well-secured systems at speeds of up to 13 KB/s.
Their research, published on August 7, 2025, demonstrates how attackers can bypass modern security protections and access arbitrary physical memory from sandboxed processes and virtual machines.
https://cyberpress.org/retbleed-vulnerability/