Intel Tdx Guest Software up to 0.3.0 comparison

Summaryinfo

A vulnerability marked as problematic has been reported in Intel Tdx Guest Software up to 0.3.0. Affected is an unknown function. This manipulation causes comparison. This vulnerability is handled as CVE-2026-20765. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Intel Tdx Guest Software up to 0.3.0 and classified as problematic. Affected by this vulnerability is an unknown code. The manipulation with an unknown input leads to a comparison vulnerability. The CWE definition for the vulnerability is CWE-697. The product compares two entities in a security-relevant context, but the comparison is incorrect, which may lead to resultant weaknesses. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at intel.com. This vulnerability is known as CVE-2026-20765 since 01/13/2026. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation needs additional levels of successful authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/11/2026).

Upgrading to version 0.3.1 eliminates this vulnerability.

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Productinfo

Vendor

• Intel

Name

• Tdx Guest Software

Version

• 0.1
• 0.2
• 0.3.0

License

• commercial

Website

• Vendor: https://www.intel.com/

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