Intel TDX MigTD: Denial of service via infinite loop in GetQuote
Summary
A flaw in the GetQuote function of Intel's TDX Migration Trust Domain (MigTD) component allows an infinite loop caused by an unreachable exit condition. An attacker with local access and system-software level privileges, such as a hypervisor-level adversary, can cause a denial of service. Confidentiality and integrity are not affected according to the CVSS vector, and the attack requires no user interaction.
Affected
- Intel(R) TDX Migration Trust Domain (MigTD)
- Exact affected versions: Unknown. Intel SA-01580 is the reference for affected versions, not verified here.
Fixed in
Unknown. Intel releases reference software updates per SA-01580; fixed versions were not verified.
Workaround
Unknown. No vendor-confirmed workaround found.
Exploitation
- Known exploitation in the wild: No evidence found.
- Public proof of concept: None found as of 10 Nov 2026.
Our recommendation
- Check whether your hosting or cloud provider operates Intel TDX / MigTD hosts and ask when they will be patched.
- Review Intel SA-01580 for affected and fixed versions and apply vendor updates where you operate MigTD.
- Monitor the NVD entry and CISA KEV for analysis updates.
- Relevance for most SMEs is low; no urgent action needed unless you run such hosts.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Intel SA-01580 advisory intel.com
- OffSeq radar: CVE-2026-55709 radar.offseq.com
- Strix: CVE-2026-55709 www.strix.ai
- MigTD GitHub releases github.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 11 Nov 2026, 10:02.
Original description (NVD)
Loop with unreachable exit condition ('infinite loop') in the MigTD's GetQuote for the Intel(R) TDX Migration Trust Domain (MigTD) within Ring 0: Hypervisor may allow a denial of service. System software adversary with an unauthenticated user combined with a low complexity attack may enable denial of service. 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 (none), integrity (none) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.