Researchers have disclosed a new hardware attack, DDRop, that targets the memory protection guarantees of Intel TDX and AMD SEV-SNP confidential computing. The attack interferes with memory writes, preventing them from being stored; as a result, the processor continues to read old encrypted data as though it were the current state.
This behavior breaks the core promise of confidential computing, which is meant to protect data in active memory even from privileged software. Because both Intel and AMD platforms rely on similar memory-protection designs, the issue affects two of the industry's main confidential-computing implementations.
The disclosure describes the attack mechanism and notes the potential impact, but it does not report active exploitation or provide specific mitigations. With only this single source, there are no conflicting accounts to compare; the significance lies in the attack's ability to undermine a foundational layer in major chipmakers' security offerings.