---
id: "CVE-2026-40693"
page: "https://infrastack.ai/live/CVE-2026-40693"
kind: "vulnerability"
aliases: ["CVE-2026-40693"]
title: "Intel TDX Workload Attestation: local user code can cause denial of service"
severity: "medium"
cvss: 5.7
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["confidential-computing", "infrastructure", "intel-tdx", "linux"]
not_affected_if: ["no-local-users", "no-tdx"]
published_at: "2026-11-10T17:17:42+00:00"
first_seen_at: "2026-11-10T17:22:43+00:00"
updated_at: "2026-11-10T17:24:19+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40693", "first_seen_at": "2026-11-10T17:22:43+00:00"}]
exploit_sources: []
---

# Intel TDX Workload Attestation: local user code can cause denial of service

Link for people: https://infrastack.ai/live/CVE-2026-40693 (this .md is for agents)

Some Intel TDX Workload Attestation software accepts unvalidated input from user-mode applications running in Ring 3. A local, authenticated attacker with low privileges can make the system unavailable, but cannot read or change data.

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

## Timeline

- 2026-11-10T17:22:43+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-40693

## From the sources

Improper input validation for some Intel(R) TDX Workload Attestation software within Ring 3: User Applications may allow a denial of service. Unprivileged software adversary with an authenticated user combined with a high complexity attack may enable denial of service. 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 (none) and availability (high) 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_