Intel TDX Workload Attestation Software input validation

Summaryinfo

A vulnerability was found in Intel TDX Workload Attestation Software and classified as critical. This affects an unknown part. Executing a manipulation can lead to input validation. The identification of this vulnerability is CVE-2026-40693. The attack can only be executed locally. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in Intel TDX Workload Attestation Software (the affected version is unknown). This vulnerability affects an unknown code. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. CVE summarizes:

Improper input validation for some Intel(R) TDX Workload Attestation software within Ring 3: User Applications may allow a denial of service. Unprivileged software adversary with an authenticated user combined with a high complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.

The advisory is shared for download at intel.com. This vulnerability was named CVE-2026-40693 since 04/18/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/10/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Intel

Name

• TDX Workload Attestation Software

License

• commercial

Website

• Vendor: https://www.intel.com/

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