CVE-2026-20765
Received Received - Intake

Privilege Escalation in Intel TDX Guest Software

Publication date: 2026-08-11

Last updated on: 2026-08-11

Assigner: Intel Corporation

Description
Incorrect comparison for some Intel(R) TDX Guest software before version 0.3.1 within Ring 3: User Applications may allow an escalation of privilege. System software adversary with a privileged user combined with a low complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (low), integrity (low) and availability (low) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.

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Meta Information

Published
2026-08-11
Last Modified
2026-08-11
Generated
2026-08-11
AI Q&A
2026-08-11
EPSS Evaluated
N/A
NVD
CVE-2026-20765
EUVD
EUVD-2026-56491

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
intel tdx_guest to 0.3.1 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-697 The product compares two entities in a security-relevant context, but the comparison is incorrect.

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Executive Summary

This is a privilege escalation vulnerability in Intel TDX Guest software before version 0.3.1. It occurs due to incorrect comparison logic in Ring 3 user applications. An attacker with privileged user access could exploit this to gain higher privileges on the system.

Impact Analysis

If exploited, this vulnerability could allow an attacker to gain elevated privileges on your system. This may lead to unauthorized access, data manipulation, or system disruption. The impact includes low confidentiality, integrity, and availability risks for the vulnerable system.

Mitigation Strategies

Update Intel TDX Guest software to version 0.3.1 or later to address the incorrect comparison vulnerability. Ensure system software is patched and restrict privileged user access to reduce attack surface.

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