Intel TDX Migration Trust Domain MigTD get_tcb_level_by_svn resource consumption

Summaryinfo

A vulnerability was found in Intel TDX Migration Trust Domain and classified as critical. This issue affects the function get_tcb_level_by_svn of the component MigTD. Such manipulation leads to resource consumption. This vulnerability is documented as CVE-2026-63027. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Intel TDX Migration Trust Domain (the affected version is unknown) and classified as critical. Affected by this issue is the function get_tcb_level_by_svn of the component MigTD. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource. Impacted is availability. CVE summarizes:

Incorrect behavior order in the get_tcb_level_by_svn for the Intel(R) TDX Migration Trust Domain (MigTD) within Ring 0: Hypervisor may allow a denial of service. Network adversary with an unauthenticated user combined with a low complexity attack may enable denial of service. This result may potentially occur via adjacent access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (low) 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 is handled as CVE-2026-63027 since 07/17/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/10/2026). The MITRE ATT&CK project declares the attack technique as T1499.

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 Migration Trust Domain

License

• commercial

Website

• Vendor: https://www.intel.com/

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