CVE-2026-24149
📋 TL;DR
NVIDIA Megatron-LM contains a code injection vulnerability (CWE-94) where malicious data can lead to arbitrary code execution. This affects all platforms running vulnerable versions of Megatron-LM. Attackers could execute code with the privileges of the Megatron-LM process.
💻 Affected Systems
- NVIDIA Megatron-LM
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise through remote code execution leading to data theft, privilege escalation, and complete control of affected systems.
Likely Case
Local code execution within the Megatron-LM context, potentially allowing data tampering, information disclosure, and lateral movement.
If Mitigated
Limited impact through proper input validation and sandboxing, potentially reduced to denial of service or limited data exposure.
🎯 Exploit Status
Exploitation requires attacker to supply malicious data to vulnerable script components.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check NVIDIA security advisory for specific patched versions
Vendor Advisory: https://nvidia.custhelp.com/app/answers/detail/a_id/
Restart Required: Yes
Instructions:
1. Check NVIDIA security advisory for CVE-2026-24149
2. Update Megatron-LM to patched version
3. Restart all Megatron-LM services
4. Validate fix using verification steps
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement strict input validation and sanitization for all data processed by Megatron-LM scripts
Process Isolation
linuxRun Megatron-LM in isolated containers or with reduced privileges
docker run --security-opt=no-new-privileges -u nobody:nogroup megatron-lm
🧯 If You Can't Patch
- Implement network segmentation to isolate Megatron-LM systems from critical infrastructure
- Deploy application-level firewalls to monitor and block suspicious script executions
🔍 How to Verify
Check if Vulnerable:
Check Megatron-LM version against NVIDIA security advisory for CVE-2026-24149Check Version:
python -c "import megatron; print(megatron.__version__)"Verify Fix Applied:
Verify installed version matches patched version from NVIDIA advisory and test with safe input validation📡 Detection & Monitoring
Log Indicators:
- Unusual script execution patterns
- Unexpected process spawns from Megatron-LM
- Error logs showing malformed input processing
Network Indicators:
- Anomalous outbound connections from Megatron-LM systems
- Unexpected data exfiltration patterns
SIEM Query:
source="megatron-lm.log" AND ("script injection" OR "unexpected execution" OR "malformed input")