After the spectacle of Spectre and Meltdown last year, we now have more vulnerabilities that attacks the CPU to leak confidential data. The new vulnerabilities are called RIDL and Fallout – not quite as catchy as Spectre and Meltdown – and it belongs to a class of attacks called MDS (Microarchitectural Data Sampling) attacks.
Our attacks can leak confidential data across arbitrary security boundaries in real-world settings (cloud, browsers, etc.).
Source: RIDL and Fallout: MDS attacks