Intel TDX MigTD: Denial of service via improper array index validation in virtio-serial driver
Summary
The virtio-serial driver of the Intel TDX Migration Trust Domain (MigTD) component does not properly validate an array index (CWE-129). A privileged user or system software adversary with local access on the host can trigger a denial of service of the MigTD component. The attack requires no user interaction and no special internal knowledge, and it does not affect confidentiality or integrity.
Affected
- Intel TDX Migration Trust Domain (MigTD); exact affected versions: Unknown (see Intel advisory INTEL-SA-01580)
Fixed in
- Unknown. Intel advisory INTEL-SA-01580 is the reference for fixed versions and updates.
Workaround
- Unknown. No vendor-confirmed workaround found. Limit privileged access on affected hosts and monitor for unusual hypervisor behavior until a fix is available.
Exploitation
- No evidence of exploitation in the wild found.
- Not listed in CISA KEV at the time of research.
- No public proof-of-concept found in the searches performed.
Our recommendation
- Check whether any hosts run Intel TDX with MigTD and live migration. If none, no action is needed beyond normal patch tracking.
- If yes, apply Intel's firmware and MigTD updates as listed in INTEL-SA-01580 and contact your hosting provider.
- Restrict privileged local access on TDX hosts.
- Review the full SA-01580 list, as other MigTD CVEs published the same day have higher scores.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Intel advisory INTEL-SA-01580 intel.com
- OffSeq record CVE-2026-59771 radar.offseq.com
- Strix CVE-2026-59771 www.strix.ai
- Intel PSIRT index www.intel.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, 11:34.
Original description (NVD)
Improper validation of array index in the MigTD's virtio-serial driver 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 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.
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