External risk intelligence

NVIDIA Infrastructure Controller Improper Certificate Validation Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-65118

The vulnerability affects an infrastructure controller component for Linux. While it involves network communication, such infrastructure management components are typically deployed within isolated, internal network segments or restricted management planes rather than directly exposed to the public internet.

Information Disclosure

Nvidia Infra Controller

before 2.0.0

Halo Surface Signal: 2 out of 5 — less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

The NVIDIA Infrastructure Controller for Linux has a vulnerability that could allow an attacker to improperly validate certificates, potentially leading to unauthorized access, data manipulation, or service disruption. This issue impacts a critical component used for managing Linux infrastructure.

Improper certificate validation in NVIDIA controller.
Could lead to sensitive data exposure or service interruption.
Confirm if this controller is used within your environment.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending specially crafted network traffic to the NVIDIA Infrastructure Controller for Linux. This traffic would exploit improper certificate validation, potentially allowing the attacker to access, alter, or disrupt system data.

Requires network access.
Exploits improper certificate validation.
Risk of data compromise or denial of service.

Live Threat

Current exploitation, exposure, and threat context

Improper certificate validation in NVIDIA Infrastructure Controller for Linux could allow an unauthenticated attacker to disclose sensitive information, tamper with data, or disrupt service when the controller is accessible over a network.

System data and configuration.
Improper certificate validation.
Information disclosure and data tampering.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability impacts NVIDIA Infrastructure Controller for Linux, likely managed by infrastructure or platform teams. The initial step is to identify all instances of this controller, confirm their network exposure and business criticality, and then ascertain the accountable owner for remediation planning.

Infrastructure and platform teams own the issue.
Verify controller presence and exposure.
Plan remediation based on identified risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is the NVIDIA Infrastructure Controller?

It is a software component designed to manage and orchestrate hardware-level operations within Linux environments. It acts as a bridge between the operating system and infrastructure resources, enabling centralized control over system tasks, resource allocation, and connectivity, which is critical for maintaining stable and performant data center operations.

What does improper certificate validation mean for CVE-2026-65118?

This vulnerability falls under the Improper Certificate Validation weakness class (CWE-295). It means the software fails to correctly verify the authenticity of digital certificates during network communications. Because the system trusts unverified connections, an attacker can bypass security checks to intercept, read, or modify data in transit, or disrupt the service entirely.

How does an attacker trigger this vulnerability?

An attacker triggers this bug by sending specially crafted network traffic to the controller. The vulnerability is activated when the system processes this illegitimate communication without properly validating its security credentials. Simply being on the same network is enough; it does not require prior authentication or specialized user interaction to initiate.

Is my system at risk according to Halo Surface Signal?

Halo Surface Signal indicates that exploitation is unlikely because this controller is typically kept within isolated, internal network segments or restricted management planes. While the vulnerability requires network access, it is generally not exposed to the public internet, which significantly reduces the likelihood of external attacks.

What steps should I take if I use this software?

First, confirm if the NVIDIA Infrastructure Controller is deployed in your environment. Consult your platform or infrastructure team to locate instances and verify their network placement. Once identified, assess the business criticality of those assets and work with the responsible owners to plan for updates to version 2.0.0 or later.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.