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{"affected": [{"configurations": [{"platform": ["all_platforms"], "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.15.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Megatron LM", "source": "cna", "vendor": "NVIDIA"}, "product": "megatron-lm", "vendor": "nvidia"}], "analysis": {"en": {"generated_at": "2026-03-26T01:42:43.631774+00:00", "value": {"mitigation_remediation": ["Apply the vendor\u2011supplied patch for NVIDIA Megatron\u2011LM or upgrade to the latest released version that addresses the checkpoint loading flaw.", "Validate checkpoint files with checksums or digital signatures before loading to ensure integrity and authenticity.", "Restrict checkpoint loading to trusted directories and remove the ability to load from user\u2011controlled locations if possible.", "Educate users and administrators about the dangers of loading unknown checkpoint files and enforce strict handling procedures."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects NVIDIA Megatron\u2011LM. No specific version range is listed in the public data, so all deployed installations of Megatron\u2011LM should be reviewed for the presence of the exploited flaw until the vendor issues a fix.", "description_and_impact": "NVIDIA Megatron\u2011LM contains a flaw that allows an attacker to cause remote code execution by persuading a user to load a maliciously crafted checkpoint file. The vulnerability can lead to code execution, privilege escalation, information disclosure and data tampering. The weakness stems from inadequate validation of checkpoint data during the loading process, identified as CWE\u2011502.", "risk_and_exploitability": "The CVSS score of 7.8 indicates a high severity, but the exploit probability is low (EPSS < 1\u202f%) and the vulnerability is not listed in CISA\u2019s Known Exploited Vulnerabilities catalog. Because the attack requires an attacker to convince a user to load a malicious checkpoint, the likely vector is social engineering or user\u2011initiated file loading. In environments where checkpoint files are routinely loaded from untrusted sources, the risk rises, but in tightly controlled settings the chance of exploitation remains modest."}}}}, "created": "2026-03-25T11:46:02.994280+00:00", "updated": "2026-03-26T12:18:48.593181+00:00", "vendors": ["nvidia", "nvidia$PRODUCT$megatron-lm"]}