CVE-2026-65114: NVIDIA Infrastructure Controller Auth Bypass

CVE-2026-65114 is an authentication bypass flaw in NVIDIA Infrastructure Controller for Linux that enables attackers to exploit missing authentication for critical functions. This post covers technical details, affected versions, potential impact including data tampering and denial of service, and mitigation strategies.

CVE-2026-65114 Overview

CVE-2026-65114 affects NVIDIA Infrastructure Controller for Linux. The flaw stems from missing authentication for a critical function [CWE-306]. An attacker on an adjacent network can invoke privileged functionality without providing credentials. Successful exploitation can lead to data tampering, denial of service, and information disclosure.

The vulnerability is exploitable over an adjacent network segment and requires no user interaction. It is classified as an authentication bypass affecting integrity and availability, with limited confidentiality impact. NVIDIA published advisory details in its product-security repository on GitHub.

Critical Impact
Unauthenticated adjacent attackers can tamper with controller state, disrupt service, and exfiltrate sensitive infrastructure data.

Affected Products

NVIDIA Infrastructure Controller for Linux (see vendor advisory for affected versions)

Discovery Timeline

2026-09-22 - CVE-2026-65114 published to NVD
2026-09-22 - Last updated in NVD database

Technical Details for CVE-2026-65114

Vulnerability Analysis

The defect is a missing authentication check on a critical function exposed by NVIDIA Infrastructure Controller for Linux. Any client capable of reaching the controller endpoint on an adjacent network can invoke the affected function directly. The controller does not validate the caller's identity before executing the request.

Because the vulnerable function performs state-changing operations, an attacker can modify configuration, corrupt managed data, or halt controller services. The advisory also indicates that information disclosure is possible, meaning sensitive infrastructure data can be retrieved through the same unauthenticated pathway. The impact scope is limited to the vulnerable component; there is no privilege boundary crossing to other systems.

Root Cause

The root cause is an authorization gap classified as [CWE-306] (Missing Authentication for Critical Function). A sensitive control-plane operation is exposed without an enforcement check that verifies the caller. Attackers do not need credentials, tokens, or prior access to trigger the vulnerable code path.

Attack Vector

Exploitation requires network reachability to the controller on an adjacent network, such as a management VLAN or a directly connected subnet. The attacker sends a crafted request to the exposed function. No user interaction is required, and the attack complexity is low. Refer to the NVIDIA product security advisory for protocol-level details.

Detection Methods for CVE-2026-65114

Indicators of Compromise

Unexpected configuration changes on the Infrastructure Controller without corresponding administrator activity.
Controller service restarts, crashes, or availability drops that align with unauthenticated management-plane requests.
Outbound transfers of controller state or telemetry to hosts outside the management subnet.

Detection Strategies

Inspect controller access logs for API calls to privileged endpoints that lack an authenticated session identifier.
Alert on management-plane requests originating from hosts not in the approved administrator inventory.
Correlate configuration changes with authenticated administrator sessions and flag mismatches.

Monitoring Recommendations

Forward controller and host logs to a centralized analytics platform for behavioral baselining.
Monitor adjacent network segments with NetFlow or packet capture for anomalous traffic to controller management ports.
Track service health and restart counters on the controller to detect denial-of-service attempts.

How to Mitigate CVE-2026-65114

Immediate Actions Required

Apply the vendor-supplied update referenced in the NVIDIA product security advisory as soon as it is available.
Restrict adjacent network access to the controller using VLAN segmentation and host firewalls.
Inventory all NVIDIA Infrastructure Controller deployments and confirm patch status.

Patch Information

NVIDIA has published advisory content for this issue in its product-security repository. Consult the NVIDIA advisory 5879 for fixed versions and upgrade guidance. The NVD entry for CVE-2026-65114 tracks additional references as they are published.

Workarounds

Place the controller management interface on an isolated network reachable only by authorized administration hosts.
Enforce access control lists on upstream switches and routers to block unapproved sources from the management VLAN.
Disable or firewall off the affected function at the network layer until the patch is applied.

bash

# Example: restrict controller management port to a trusted admin subnet
iptables -A INPUT -p tcp --dport <controller_port> -s 10.10.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport <controller_port> -j DROP