Intel TDX MigTD: Write-what-where condition enables privilege escalation
Summary
A write-what-where condition in the Migration Trust Domain (MigTD) of Intel TDX allows a local attacker with privileged access on the host to escalate privileges and potentially disclose information. The attacker must already be a privileged system software user, and the flaw requires no user interaction. The CVSS score of 8.4 rests on high confidentiality, integrity and availability impact, but Intel's advisory rates the overall severity as medium and the NVD entry is still pending.
Affected
- Intel TDX Migration Trust Domain (MigTD)
- Exact affected versions: Unknown.
Fixed in
Unknown. Intel advisory INTEL-SA-01580 is the reference for fixed versions.
Workaround
Unknown. No mitigation was documented in the sources available at the time of writing.
Exploitation
- Exploited in the wild: Nothing known.
- Public proof of concept: Nothing known.
Our recommendation
- Ask your cloud or hosting provider whether TDX-based confidential VMs are used and whether the fix has been applied.
- If you operate TDX hosts, apply Intel's reference software updates as soon as they are available and restrict privileged local access.
- Monitor Intel advisory INTEL-SA-01580 and the NVD entry for updates.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Intel Security Advisory INTEL-SA-01580 intel.com
- Intel MigTD GitHub repository github.com
- MigTD 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 10 Nov 2026, 19:28.
Original description (NVD)
Write-what-where condition in the MigTD for the Intel(R) TDX Migration Trust Domain (MigTD) within Ring 0: Hypervisor may allow an information disclosure and 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 (high), integrity (high) 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.
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