Latest research in Virtualization Security in Cloud Computing focuses on addressing emerging threats and enhancing the security of virtualized environments. Studies highlight vulnerabilities such as VMSCAPE, a Spectre-BTI-based attack that allows malicious virtual machines to extract sensitive host data, and propose mitigations like flushing CPU branch predictors with minimal performance overhead. Research also explores advancements in quantum virtualization, including technologies like HyperQ, which enable multiple users to run isolated programs on a single quantum computer, improving scalability, reducing wait times, and providing flexible cloud-style virtualization. Overall, these efforts aim to strengthen the security, reliability, and efficiency of both classical and quantum virtualized cloud infrastructures.