CVE-2025-31356 Intel CVE debrief

Who should care

Defenders and system administrators responsible for Intel-based systems and hypervisor configurations should assess exposure and prioritize verification for privileged user access and local system software.

Why it matters

CVE-2025-31356: Insufficient data authenticity verification in Intel Trust Domain Extensions may enable information disclosure via local access with high complexity attack requirements, impacting confidentiality and integrity.

• Potential data exposure and confidentiality impacts require verification
• Local access restrictions and complexity requirements need assessment
• Privileged user access controls and hypervisor configurations require review

Technical summary

Insufficient verification of data authenticity for some Intel(R) Trust Domain Extensions (Intel(R) TDX) within Ring 0: Hypervisor may allow an information disclosure. A system software adversary with a privileged user access combined with a high complexity attack may enable data exposure. This vulnerability affects Intel-based systems and hypervisor configurations, requiring defenders to assess exposure and prioritize verification for privileged user access and local system software. The potential vulnerability may impact the confidentiality (high), integrity (low) and no effect on availability.

Defensive priority

Assess exposure and prioritize verification for privileged user access and local system software

Recommended defensive actions

• Review system software and hypervisor configurations for privileged user access controls
• Verify local access restrictions and complexity requirements for Intel TDX
• Assess potential data exposure and confidentiality impacts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

Official CVE Program and NVD records indicate insufficient data authenticity verification in Intel Trust Domain Extensions, potentially enabling information disclosure via local access with high complexity attack requirements.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.