CVE-2025-33194 Overview
CVE-2025-33194 affects the NVIDIA DGX Spark GB10 platform through a flaw in its SROOT firmware. The vulnerability allows an authenticated local attacker to submit malformed input that the firmware processes improperly. Successful exploitation can lead to information disclosure or denial of service on affected DGX systems. The issue is tracked under [CWE-180: Incorrect Behavior Order: Validate Before Canonicalize]. NVIDIA published a security bulletin addressing the flaw in the DGX OS and DGX Spark hardware components.
Critical Impact
A local, low-privileged attacker can trigger improper firmware processing on DGX Spark GB10 systems, resulting in confidentiality loss and service disruption of AI workload infrastructure.
Affected Products
- NVIDIA DGX Spark (GB10 hardware platform)
- NVIDIA DGX OS
- NVIDIA DGX Spark SROOT firmware component
Discovery Timeline
- 2025-11-25 - CVE-2025-33194 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-33194
Vulnerability Analysis
The vulnerability resides in the SROOT firmware shipped with the NVIDIA DGX Spark GB10 platform. SROOT handles low-level platform initialization and secure root-of-trust functions for the DGX appliance. Improper handling of input data within this firmware allows an attacker with local access and low privileges to influence firmware execution paths.
Because the flaw sits in firmware rather than user-space software, exploitation targets a trust boundary below the operating system. An attacker who gains a local foothold on a DGX Spark host can craft input that the SROOT firmware processes incorrectly, reaching states the developers did not anticipate. The consequences are limited to confidentiality and availability; integrity is not directly impacted according to the CVSS vector.
Root Cause
The root cause is classified under [CWE-180], which covers incorrect ordering of validation and canonicalization on input data. The SROOT firmware performs security-relevant checks before normalizing input, allowing crafted values to bypass validation and later be interpreted differently once canonicalized. This mismatch enables the improper processing that leads to disclosure of sensitive firmware state or an unrecoverable error condition.
Attack Vector
Exploitation requires local access to a DGX Spark GB10 system and low-privilege credentials. No user interaction is needed. An attacker leverages a shell or service account on the host to submit crafted input to a firmware-exposed interface. The resulting improper processing either exposes memory contents through side channels or error output, or halts firmware execution, denying service to running AI workloads.
No public proof-of-concept exploit is available for this issue at the time of publication. Refer to the NVIDIA Support Response for vendor technical details.
Detection Methods for CVE-2025-33194
Indicators of Compromise
- Unexpected DGX Spark reboots, firmware error messages, or SROOT initialization failures recorded in platform logs.
- Unusual local process activity from low-privileged accounts interacting with firmware update or management interfaces.
- Unexplained crashes or degraded performance of GPU workloads scheduled on the DGX Spark host.
Detection Strategies
- Correlate baseboard management controller (BMC) and platform event logs with host-level authentication events to spot local users triggering firmware faults.
- Monitor for repeated invocations of NVIDIA management utilities that pass unusual argument patterns to firmware components.
- Alert on any deviation from expected SROOT firmware version and integrity attestation values across the DGX fleet.
Monitoring Recommendations
- Forward DGX OS syslog, kernel ring buffer, and IPMI/BMC events to a centralized logging platform for retention and analysis.
- Track local account creation, privilege changes, and interactive session activity on all DGX Spark hosts.
- Baseline normal firmware error rates so anomalies indicating exploitation attempts stand out.
How to Mitigate CVE-2025-33194
Immediate Actions Required
- Apply the SROOT firmware update referenced in the NVIDIA Security Bulletin to all DGX Spark GB10 systems.
- Inventory every DGX Spark host and confirm the running SROOT firmware version matches the fixed release.
- Restrict local and interactive access to DGX appliances to a minimal set of administrators.
Patch Information
NVIDIA has issued a security bulletin addressing CVE-2025-33194 in the DGX Spark GB10 SROOT firmware. Administrators should follow the update instructions in the vendor advisory at NVIDIA answer ID 5720 and validate firmware integrity after the update completes. No alternative fix is available outside the vendor patch.
Workarounds
- Enforce strict role-based access control on DGX Spark hosts to prevent low-privileged users from reaching firmware interfaces.
- Isolate DGX Spark management networks from general-purpose user networks to limit local attack surface.
- Disable unused local services and remove unnecessary interactive accounts on the appliance until the firmware patch is deployed.
# Verify the installed SROOT firmware version on DGX Spark
# Replace with the fixed version listed in NVIDIA answer ID 5720
sudo nvidia-smi -q | grep -i firmware
sudo dmidecode -t bios
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
