CVE-2025-47277: vLLM Remote Code Execution via PyNcclPipe

# CVE-2025-47277: vLLM Remote Code Execution via PyNcclPipe

https://gcdradar.vercel.app/incidents/cve-2025-47277-vllm-remote-code-execution-via-pyncclpipe · AIR-2025-0285 · closed 2025-05-20

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2025-05-20
- AI role: Attack on AI
- Products: vLLM
- CVE ids: CVE-2025-47277
- CVSS: 9.8

## Summary

A remote code execution vulnerability affects vLLM environments utilizing the PyNcclPipe KV cache transfer integration. Unauthenticated or improper handling in communication channels permits arbitrary code execution.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2025-05-20: CVE-2025-47277: vLLM, an inference and serving engine for large language models (LLMs), has an issue in versions 0.6.5 through 0.8.4 that ONLY… (https://nvd.nist.gov/vuln/detail/CVE-2025-47277)
- 2025-05-20: CVE-2025-47277: vLLM Allows Remote Code Execution via PyNcclPipe Communication Service (https://github.com/advisories/GHSA-hjq4-87xh-g4fv)

## Sources

- 2025-05-20 GitHub Advisory Database: CVE-2025-47277: vLLM Allows Remote Code Execution via PyNcclPipe Communication Service https://github.com/advisories/GHSA-hjq4-87xh-g4fv
- 2025-05-20 NVD: CVE-2025-47277: vLLM, an inference and serving engine for large language models (LLMs), has an issue in versions 0.6.5 through 0.8.4 that ONLY… https://nvd.nist.gov/vuln/detail/CVE-2025-47277

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.