Intel MigTD: Escalation of privilege in virtio-vsock implementation
Summary
The virtio-vsock implementation of Intel's MigTD for Intel TDX uses an out-of-range pointer offset (CWE-823). A local attacker with privileged (host or hypervisor administrator) access and low attack complexity may escalate privileges. CVSS 4.0 base score is 8.4 (High), but exploitation requires high privileges and local access.
Affected
- Intel TDX Migration Trust Domain (MigTD), virtio-vsock implementation
- Exact affected versions: Unknown.
Fixed in
Unknown.
Workaround
- Unknown. No vendor mitigation guidance was retrievable.
- Interim measure: restrict privileged host and hypervisor administrator access on TDX hosts.
Exploitation
- No known exploitation in the wild.
- No public proof of concept known.
- Not listed in CISA KEV at time of writing.
Our recommendation
- Check whether any systems run Intel TDX with MigTD live migration. Most standard SME virtualisation hosts are not affected.
- If affected, review Intel advisory INTEL-SA-01580 and apply the vendor reference software update once the affected and fixed versions are confirmed.
- Restrict privileged administrator access on TDX hosts and monitor for unusual administrative activity.
- Re-check the advisory and NVD entry, as both were not yet populated at the time of research.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Intel advisory INTEL-SA-01580 intel.com
- Intel MigTD GitHub repository github.com
- MigTD GitHub releases github.com
- CWE-823: Use of Out-of-range Pointer Offset cwe.mitre.org
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, 19:27.
Original description (NVD)
Use of out-of-range pointer offset in the MigTD's virtio-vsock implementation for the Intel(R) TDX Migration Trust Domain (MigTD) within Ring 0: Hypervisor may allow an 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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