CVE-2025-31936 Intel CVE debrief

Who should care

System administrators, security teams, and IT personnel responsible for Intel(R) Xeon(R) 6 processors and Intel(R) TDX within SMM should assess exposure and prioritize patching. They should verify system configurations and inventory, monitor system integrity and confidentiality, and review and update incident response plans.

Why it matters

CVE-2025-31936 requires verification of Intel(R) Xeon(R) 6 processors configurations and patching to prevent potential escalation of privilege when using Intel(R) TDX within SMM.

• Escalation of privilege requires high complexity attack and privileged user
• Potential impact on confidentiality (high) and integrity (high)
• No impact on availability (none)
• Verification of system configurations and inventory required

Technical summary

Improper handling of overlap between protected memory ranges for some Intel(R) Xeon(R) 6 processors when using Intel(R) TDX within SMM may allow an escalation of privilege. SMM adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. The vulnerability affects Intel(R) Xeon(R) 6 processors and requires high complexity attack and privileged user. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (none) of the vulnerable system.

Defensive priority

System administrators and security teams should prioritize patching Intel(R) Xeon(R) 6 processors when using Intel(R) TDX within SMM to prevent potential escalation of privilege.

Recommended defensive actions

• Patch Intel(R) Xeon(R) 6 processors when using Intel(R) TDX within SMM
• Verify system configurations and inventory
• Monitor system integrity and confidentiality
• Review and update incident response plans
• Perform vulnerability scanning
• Implement compensating controls
• Review system logs for suspicious activity

Evidence notes

The Intel advisory explicitly states that the vulnerability impacts 'Intel(R) Xeon(R) 6 processors' when using Intel(R) TDX within SMM. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (none) of the vulnerable system. The vulnerability requires verification of Intel(R) Xeon(R) 6 processors configurations and patching to prevent potential escalation of privilege. Evidence is limited to the Intel advisory and CVE record.

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.