CVE-2025-23265: Code Injection in NVIDIA Megatron-LM

Successful exploitation of CVE-2025-23265 allows an attacker to inject and execute arbitrary code within the Megatron-LM environment. This could lead to complete system compromise, enabling the attacker to steal sensitive training data, modify model parameters, or even gain control of the underlying infrastructure. The potential for privilege escalation is significant, as the attacker could leverage the injected code to gain higher-level access. Data tampering could corrupt the training process, leading to biased or unreliable models. The blast radius extends to any system running vulnerable versions of Megatron-LM, particularly those involved in critical AI model development and deployment.

1. Reserved2025-01-14
2. Published2025-06-24
3. EPSS updated2026-03-23

The primary mitigation for CVE-2025-23265 is to immediately upgrade to NVIDIA Megatron-LM version 0.12.0 or later. If upgrading is not immediately feasible, implement strict input validation on all files processed by Megatron-LM. Specifically, sanitize file names and content to prevent the injection of malicious code. Consider using a Web Application Firewall (WAF) to filter potentially harmful file uploads. Regularly review and update the Megatron-LM configuration to minimize the attack surface. After upgrading, verify the fix by attempting to upload a known malicious file and confirming that it is rejected or handled safely.