CVE-2025-33248: NVIDIA Megatron-LM contains a vulnerability in the hybrid conversion script where an Attacker may cause an RCE

Q: How do I fix CVE-2025-33248?

megatron-lm: upgrade to 0.15.3. Exact commands for each OS are on this page.

Q: Is CVE-2025-33248 being exploited?

CVE-2025-33248 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-33248 affect?

CVE-2025-33248 affects megatron-lm. Severity is high (CVSS 7.8). NVIDIA Megatron-LM contains a vulnerability in the hybrid conversion script where an Attacker may cause an RCE by convincing a user to load a maliciously crafted file. A successful exploit of this vulnerability may lead to code execution, e

Routine

HIGH 7.8UPGRADE

CVE-2025-33248 is a high-severity flaw (CVSS 7.8) affecting megatron-lm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NVIDIA Megatron-LM contains a vulnerability in the hybrid conversion script where an Attacker may cause an RCE by convincing a user to load a maliciously crafted file. A successful exploit of this vulnerability may lead to code execution, escalation of privileges, information disclosure, and data tampering.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-502
Published	2026-03-24
Last modified	2026-06-17

Publisher (CNA): NVIDIA Corporation · Vendor: nvidia

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-24 21:16 UTCPublished CVE record published
2026-06-17 09:13 UTCUpdated Record last modified

nvidia megatron-lm UPGRADE

Affected: < 0.15.3

Fixed in: 0.15.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy megatron-lm || rpm -q megatron-lm || megatron-lm --version

2. UPGRADE to 0.15.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade megatron-lm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade megatron-lm

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-33248?

megatron-lm: upgrade to 0.15.3. Exact commands for each OS are on this page.

Is CVE-2025-33248 being exploited?

CVE-2025-33248 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-33248 affect?

CVE-2025-33248 affects megatron-lm. Severity is high (CVSS 7.8). NVIDIA Megatron-LM contains a vulnerability in the hybrid conversion script where an Attacker may cause an RCE by convincing a user to load a maliciously crafted file. A successful exploit of this vulnerability may lead to code execution, e

How urgent is CVE-2025-33248?

Priority 30/100. High severity

Software pages

NVIDIA vulnerabilities

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References

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