CVE-2026-24225: NVIDIA DGX Spark Information Disclosure

CVE-2026-24225 Overview

CVE-2026-24225 affects the NVIDIA DGX Spark standalone Management Mode (MM) firmware. The flaw allows a local attacker with high privileges to trigger an out-of-bounds read condition. Successful exploitation can lead to information disclosure from firmware memory.

The vulnerability is classified under [CWE-125] (Out-of-bounds Read). It requires local access and elevated privileges, and it does not require user interaction. The scope is marked as changed, meaning impact extends beyond the vulnerable component to protected firmware memory regions.

Critical Impact
A local, privileged attacker can read out-of-bounds firmware memory in NVIDIA DGX Spark, potentially disclosing sensitive information handled by the standalone MM firmware.

Affected Products

NVIDIA DGX Spark
NVIDIA DGX Spark standalone MM firmware
See the NVIDIA product security advisory for specific affected firmware versions

Discovery Timeline

2026-08-25 - CVE-2026-24225 published to NVD
2026-08-25 - Last updated in NVD database

Technical Details for CVE-2026-24225

Vulnerability Analysis

The NVIDIA DGX Spark standalone MM firmware performs a memory read operation without proper boundary validation. An attacker who has already obtained high-privilege access on the local system can craft input that causes the firmware to read outside the intended buffer. The read data can then be observed by the attacker, resulting in information disclosure.

Management Mode firmware operates at a privilege level below the operating system and manages platform functions such as power, hardware initialization, and secure operations. Data leaked from this layer can include sensitive platform state and secrets that the operating system is not meant to access directly.

The vulnerability affects confidentiality only. Integrity and availability are not impacted. The attack complexity is low, but the requirement for local access with high privileges reduces the practical exposure.

Root Cause

The root cause is missing bounds checking on a read operation inside the standalone MM firmware. The firmware code accesses a memory region using an attacker-influenced index or length value without validating that it stays within the allocated buffer. This is a classic [CWE-125] pattern.

Attack Vector

Exploitation requires a local attacker with high privileges on the DGX Spark system. The attacker interacts with the MM firmware interface and supplies input that causes the firmware to read beyond a valid buffer. Because the scope is changed, the disclosed data crosses a trust boundary from firmware to the calling context. No verified proof-of-concept exploit is publicly available. Refer to the NVIDIA security bulletin for firmware-level technical details.

Detection Methods for CVE-2026-24225

Indicators of Compromise

No public indicators of compromise have been published for CVE-2026-24225.
Unexpected firmware interface calls originating from privileged local processes on DGX Spark systems.
Anomalous access patterns to MM firmware entry points not tied to normal platform management workflows.

Detection Strategies

Monitor privileged process activity on DGX Spark hosts for unusual interaction with management mode interfaces.
Correlate local privilege escalation events with subsequent firmware or low-level platform activity.
Track firmware version inventory to identify systems still running vulnerable builds.

Monitoring Recommendations

Enable endpoint telemetry collection on DGX Spark hosts and forward events to a centralized analytics platform.
Alert on any process running with root or administrator privileges that issues sequences of low-level platform management calls.
Review privileged account usage on DGX Spark systems and validate that only expected operators hold high privileges.

How to Mitigate CVE-2026-24225

Immediate Actions Required

Inventory all NVIDIA DGX Spark systems and record the current MM firmware version.
Apply the firmware update published in the NVIDIA product security advisory as soon as it is validated in your environment.
Restrict high-privilege local access on DGX Spark systems to a minimum set of trusted administrators.
Audit recent privileged sessions on affected hosts to confirm no unauthorized access occurred.

Patch Information

NVIDIA has published a product security advisory for this issue. Consult the NVIDIA product security repository entry 5867 for the fixed firmware versions and update procedures specific to DGX Spark. Additional metadata is available in the NIST NVD entry for CVE-2026-24225 and the CVE.org record.

Workarounds

Limit local accounts on DGX Spark systems to reduce the pool of users who can meet the high-privilege precondition.
Enforce multi-factor authentication and session logging for administrative access to affected hosts.
Isolate DGX Spark systems on a management network segment with strict access controls until firmware is updated.

bash

# Example: list local privileged users on a Linux-based DGX Spark host
getent group sudo
getent group wheel
# Review who can escalate before applying the NVIDIA firmware update