CVE-2025-33188: Nvidia DGX OS Information Disclosure Flaw

CVE-2025-33188 Overview

CVE-2025-33188 affects the NVIDIA DGX Spark GB10 platform through a flaw in hardware resource controls. An authenticated local attacker can tamper with hardware controls exposed by the device. Successful exploitation can lead to information disclosure, data tampering, or denial of service on the affected system.

The issue is tracked under CWE-269: Improper Privilege Management and impacts both the DGX Spark hardware and the DGX OS software stack shipped by NVIDIA. NVIDIA published a security notice for the issue in its customer support portal.

Critical Impact
A local, low-privileged attacker can manipulate hardware controls on DGX Spark GB10, resulting in high impact to confidentiality, integrity, and availability of the AI workstation.

Affected Products

NVIDIA DGX Spark (GB10 hardware platform)
NVIDIA DGX OS (all versions prior to the fix referenced in NVIDIA advisory a_id/5720)
Workloads and data hosted on affected DGX Spark systems

Discovery Timeline

2025-11-25 - CVE-2025-33188 published to the National Vulnerability Database
2025-11-25 - NVIDIA publishes support article a_id/5720 covering the issue
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-33188

Vulnerability Analysis

The vulnerability resides in the hardware resource control surface exposed by the NVIDIA DGX Spark GB10 platform. An attacker with local, low-privileged access can reach hardware controls that should be restricted to higher privilege levels. This exposure enables the attacker to influence device state beyond their assigned privilege boundary.

Because the flaw sits in the hardware control path, exploitation can cross the boundary between user workloads and the underlying accelerator hardware. Impacted operations include reading sensitive data processed on the device, modifying stored or in-flight data, and disrupting hardware availability. No user interaction is required to trigger the condition, and the scope remains unchanged after exploitation.

Root Cause

The root cause maps to CWE-269: Improper Privilege Management. Hardware control interfaces on the GB10 platform enforce insufficient privilege checks, allowing a local account to interact with resources reserved for privileged contexts. NVIDIA has not published low-level technical detail beyond the advisory description.

Attack Vector

Exploitation requires local access to a DGX Spark GB10 system with a valid low-privileged account. The attacker interacts with the exposed hardware control interfaces from a shell or existing process context on the DGX OS. No network reachability and no user interaction are required. Consult the NVIDIA Support Article for vendor-supplied technical context.

No public proof-of-concept code has been released for CVE-2025-33188. NVIDIA has not published exploitation samples, and the issue is not listed on the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2025-33188

Indicators of Compromise

Unexpected access attempts against DGX Spark GB10 hardware control interfaces from non-administrative accounts
Unexplained changes to hardware configuration, firmware state, or accelerator operating parameters
Unscheduled resets, hangs, or performance degradation of the DGX Spark GB10 accelerator
Local account activity outside of documented administrator workflows on DGX OS hosts

Detection Strategies

Enable Linux audit rules on DGX OS to log access to hardware control device nodes and sysfs entries used by GB10 management components
Monitor privileged command execution and sudo usage by non-administrative users on DGX Spark systems
Baseline expected hardware telemetry (temperature, clock, power) and alert on anomalous deviations that could indicate tampering
Correlate local shell activity with hardware state changes to identify unauthorized manipulation

Monitoring Recommendations

Forward DGX OS audit logs, auth.log, and NVIDIA management daemon logs to a centralized logging or SIEM platform
Track logon events and lateral movement into DGX Spark hosts, including SSH and console sessions
Alert on installation of unsigned kernel modules or userspace tools that interact with GB10 hardware
Review NVIDIA advisory a_id/5720 for vendor-provided detection guidance and updated indicators

How to Mitigate CVE-2025-33188

Immediate Actions Required

Apply the DGX OS update referenced in the NVIDIA Support Article as soon as it is available in your maintenance window
Inventory all DGX Spark GB10 systems and confirm patch status against the NVIDIA advisory
Restrict local shell access to the smallest possible set of trusted administrators
Rotate credentials for any local accounts on DGX Spark hosts if unauthorized access is suspected

Patch Information

NVIDIA has published fix information in security notice a_id/5720. Administrators should follow the vendor guidance in the NVIDIA Support Article to obtain and apply the DGX OS update covering CVE-2025-33188. Verify fixed component versions against the advisory before returning systems to production workloads.

Workarounds

Limit interactive and SSH access to DGX Spark GB10 systems to a small, audited administrator group
Enforce role-based access control on DGX OS and remove unnecessary local accounts
Isolate DGX Spark systems on a dedicated management network segment with strict access policies
Enable host-based auditing and endpoint monitoring on DGX OS to detect misuse pending patch deployment

bash

# Configuration example: restrict SSH access and audit hardware control paths on DGX OS

# 1) Limit SSH to a dedicated admin group
sudo groupadd -f dgx-admins
sudo usermod -aG dgx-admins <admin-user>
echo 'AllowGroups dgx-admins' | sudo tee -a /etc/ssh/sshd_config
sudo systemctl restart ssh

# 2) Add auditd rules for NVIDIA device nodes and management sysfs paths
sudo tee /etc/audit/rules.d/nvidia-gb10.rules > /dev/null <<'EOF'
-w /dev/nvidia0 -p rwa -k nvidia_hw_access
-w /dev/nvidiactl -p rwa -k nvidia_hw_access
-w /sys/class/nvidia/ -p rwa -k nvidia_hw_sysfs
EOF
sudo augenrules --load
sudo systemctl restart auditd