CVE-2025-33216: NVIDIA SNAP-4 Container DoS Vulnerability

CVE-2025-33216 Overview

CVE-2025-33216 is a denial of service vulnerability affecting the NVIDIA SNAP-4 Container. The vulnerability exists in the configuration interface where an attacker on a virtual machine may cause an incorrect calculation of buffer size by sending specially crafted configurations. A successful exploit of this vulnerability may lead to a crash of the SNAP service, causing denial of service of the storage service to the host.

Critical Impact
An attacker with local network access from a VM can crash the SNAP storage service, disrupting storage availability for the entire host system.

Affected Products

NVIDIA SNAP-4 Container

Discovery Timeline

2026-03-24 - CVE CVE-2025-33216 published to NVD
2026-03-25 - Last updated in NVD database

Technical Details for CVE-2025-33216

Vulnerability Analysis

This vulnerability is classified under CWE-131 (Incorrect Calculation of Buffer Size). The flaw resides in the NVIDIA SNAP-4 Container's configuration interface, which fails to properly validate or calculate buffer sizes when processing configuration data from virtual machines.

The attack requires adjacent network access, meaning the attacker must be positioned on a VM within the same network segment as the vulnerable SNAP-4 Container. While authentication is required (low privilege level), no user interaction is necessary to exploit this vulnerability. The scope is changed, indicating that the vulnerability affects resources beyond the vulnerable component itself—specifically impacting the host's storage service availability.

The impact is limited to availability, with no effect on confidentiality or integrity. However, the availability impact is rated as high, as successful exploitation results in complete denial of the storage service to the host system.

Root Cause

The root cause of CVE-2025-33216 is an incorrect calculation of buffer size (CWE-131) within the SNAP-4 Container's configuration interface. When processing configuration data received from virtual machines, the software improperly calculates the required buffer size. This miscalculation occurs when handling specially crafted configuration payloads, leading to memory corruption or unexpected behavior that crashes the SNAP service.

Attack Vector

The attack vector for this vulnerability is via Adjacent Network access. An attacker must be positioned on a virtual machine that has network connectivity to the SNAP-4 Container's configuration interface. The attack flow involves:

The attacker gains access to a VM within the same network segment as the vulnerable SNAP-4 Container
The attacker crafts malicious configuration data designed to trigger the buffer size miscalculation
The crafted configuration is sent to the SNAP-4 Container's configuration interface
The incorrect buffer size calculation causes the SNAP service to crash
Storage services become unavailable to the host system, resulting in denial of service

The vulnerability mechanism involves sending malformed configuration parameters that exploit the buffer size calculation logic. When the SNAP service attempts to process these configurations, the incorrect buffer allocation leads to service instability and eventual crash. For detailed technical information, refer to the NVIDIA Support Answer.

Detection Methods for CVE-2025-33216

Indicators of Compromise

Unexpected crashes or restarts of the SNAP service on NVIDIA SNAP-4 Containers
Storage service unavailability reported by host systems connected to SNAP-4 Containers
Unusual configuration requests or traffic patterns originating from virtual machines to SNAP-4 configuration interfaces
Error logs indicating buffer allocation failures or memory-related exceptions in SNAP service logs

Detection Strategies

Monitor SNAP service availability and implement alerting for unexpected service interruptions or restarts
Implement network monitoring to detect anomalous configuration traffic from VMs to SNAP-4 Container interfaces
Review SNAP-4 Container logs for repeated configuration parsing errors or memory allocation failures
Deploy intrusion detection rules to identify malformed configuration payloads targeting the SNAP configuration interface

Monitoring Recommendations

Configure health checks for SNAP services with automatic alerting on service degradation or crashes
Implement centralized logging for all SNAP-4 Container instances to correlate crash events across the infrastructure
Monitor network traffic patterns between VMs and SNAP-4 Containers for unusual configuration request volumes or payloads
Establish baseline metrics for SNAP service memory utilization to detect anomalous behavior

How to Mitigate CVE-2025-33216

Immediate Actions Required

Review the NVIDIA Support Answer for specific patch and update information
Restrict network access to SNAP-4 Container configuration interfaces from untrusted virtual machines
Implement network segmentation to limit VM access to SNAP-4 configuration interfaces
Enable enhanced logging on SNAP-4 Containers to capture potential exploitation attempts

Patch Information

NVIDIA has published security guidance for this vulnerability. Administrators should consult the official NVIDIA Support Answer for detailed patching instructions and updated software versions. Organizations should prioritize applying the vendor-provided patches to affected SNAP-4 Container deployments.

Workarounds

Implement strict network access controls to limit which VMs can communicate with SNAP-4 Container configuration interfaces
Deploy network segmentation or firewall rules to restrict configuration interface access to trusted management networks only
Monitor SNAP service health continuously and implement automatic restart capabilities to minimize downtime impact
Consider deploying redundant SNAP services where possible to maintain storage availability during potential attacks

bash

# Example: Network access restriction for SNAP configuration interface
# Restrict configuration interface access to trusted management subnet only
iptables -A INPUT -p tcp --dport <SNAP_CONFIG_PORT> -s <TRUSTED_MGMT_SUBNET> -j ACCEPT
iptables -A INPUT -p tcp --dport <SNAP_CONFIG_PORT> -j DROP