The latest security information on Intel® products.
TDXRay
Announcement ID:
INTEL-2026-04-02-001
Issue:
Researchers from University of California San Diego, CISPA, and Google published a paper titled “TDXRay: Microarchitectural Side-Channel Analysis of Intel TDX for Real-World Workloads” claiming a malicious cloud host can infer sensitive data from Confidential VMs (CVMs).
The paper describes an attack that relies on secret-dependent memory accesses that may allow information to be inferred through architecturally permitted observation of shared microarchitectural resources (such as cache behavior and timing). This type of attack can be mitigated in software inside the TEE when Intel’s Security Best Practices for Side Channel Resistance are followed.
Intel continuously evaluates and strengthens its platform and software security mitigations to reduce exposure to microarchitectural and side-channel threats. This type of research helps to inform our future responses to the evolving threat landscape.
Acknowledgements:
Intel would like to thank Tristan Hornetz, Hosein Yavarzadeh, Albert Cheu, Adria Gascon, Lukas Gerlach, Daniel Moghimi, Phillip Schoppmann, Michael Schwarz, and Ruiyi Zhang for sharing this research.
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