Intel TDX MigTD: Time-of-check time-of-use race condition in shared memory
Summary
The Intel TDX Migration Trust Domain (MigTD) component, which handles live migration of TDX confidential VMs, contains a time-of-check time-of-use race condition in its shared memory handling (CWE-367). According to the CVSS vector, a local attacker with high privileges, such as a compromised system software component, could corrupt data or cause a denial of service. Exploitation requires local access and attack requirements being present, and the issue is mainly relevant to hosts that perform live migration of TDX confidential VMs.
Affected
- Intel TDX Migration Trust Domain (MigTD). Affected versions: Unknown. The CVE record refers to Intel advisory INTEL-SA-01580.
Fixed in
Unknown. Check Intel advisory INTEL-SA-01580 for fixed MigTD releases.
Workaround
Unknown. The CVE record does not describe a workaround.
Exploitation
- Not known to be exploited at the time of research (11 Nov 2026).
- No public proof of concept found.
- Not confirmed against the CISA KEV catalogue.
Our recommendation
- Ask your hosting or cloud provider whether you run TDX hosts with live migration and for their patch status against INTEL-SA-01580.
- If you operate your own TDX hardware, apply the firmware or TDX module updates named in the Intel advisory.
- Monitor NVD for the final affected-product list.
- Priority for typical SMEs: low.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Intel advisory INTEL-SA-01580 intel.com
- Intel security center www.intel.com
- Strix CVE-2026-49036 www.strix.ai
- OffSeq Radar CVE-2026-49036 radar.offseq.com
- Intel TDX Module 1.5 TD Migration specification cdrdv2-public.intel.com
- Microsoft: Live Migration for Confidential Computing techcommunity.microsoft.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, 15:48.
Original description (NVD)
Time-of-check time-of-use race condition in the MigTD shared memory for the Intel(R) TDX Migration Trust Domain (MigTD) within Ring 0: Hypervisor may allow a denial of service. System software adversary with a privileged user combined with a low complexity attack may enable data corruption. 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 (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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