---
id: "CVE-2026-56759"
page: "https://infrastack.ai/live/CVE-2026-56759"
kind: "vulnerability"
aliases: ["CVE-2026-56759"]
title: "Intel TDX MigTD: PCI BAR input validation flaw allows privilege escalation locally"
severity: "medium"
cvss: 6.7
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["confidential-computing", "hypervisor", "infrastructure", "intel-tdx", "migtd"]
not_affected_if: ["no-tdx-migration"]
published_at: "2026-11-10T18:17:41+00:00"
first_seen_at: "2026-11-10T18:22:59+00:00"
updated_at: "2026-11-10T18:24:49+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56759", "first_seen_at": "2026-11-10T18:22:59+00:00"}]
exploit_sources: []
---

# Intel TDX MigTD: PCI BAR input validation flaw allows privilege escalation locally

Link for people: https://infrastack.ai/live/CVE-2026-56759 (this .md is for agents)

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.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-11-10T18:22:59+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-56759

## From 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.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_