CVE-2026-56759 · Infrastructure
NO FIX YET
Intel's MigTD component of the TDX Migration Trust Domain has an input validation flaw in PCI BAR handling that can let a privileged system software adversary escalate privilege or corrupt data. An attacker needs local access and a privileged user position, and the sources report high integrity impact with no confidentiality or availability impact.
first public Nov 10, 2026 · 1 source
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Affects hosts running Intel TDX with the MigTD migration trust domain in a Ring 0 hypervisor context, according to the NVD description. Systems without TDX live migration via MigTD are not described as affected. The sources do not give version ranges or a vendor advisory link.
Not affected if no-tdx-migration
Who cares confidential-computing, hypervisor, intel-tdx, migtd
Unknown from the sources.
No fix yet, per the sources.
Improper input validation in the MigTD PCI BAR handling 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 data corruption. 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 (high) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
This page as .md · .json · CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
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