CVE-2025-47277 — AI Deep Analysis Summary

🚨 **Essence**: vLLM (LLM inference engine) has a critical code flaw in KV cache transport. 📉 **Consequences**: CVSS 9.8 (Critical). Full system compromise: Confidentiality, Integrity, and Availability are all HIGH risk.…

🛡️ **Root Cause**: CWE-502 (Deserialization of Untrusted Data). 🐛 **Flaw**: PyNcclPipe KV cache transfer fails to restrict TCPStore interface access scope. ⚠️ Unrestricted access allows malicious input injection.

🎯 **Affected**: vLLM Project. 📦 **Versions**: 0.6.5 through 0.8.4. 📅 **Published**: May 20, 2025. 🏢 **Vendor**: vllm-project.

💀 **Attacker Actions**: Remote Code Execution (RCE) likely via deserialization. 🔓 **Privileges**: No privileges required (PR:N).…

🔓 **Threshold**: LOW. 🌐 **Network**: Attack Vector is Network (AV:N). 🔑 **Auth**: None required (PR:N). 👤 **User Interaction**: None required (UI:N). 🚀 Easy to exploit remotely.

📜 **Public Exp**: No specific PoC code listed in data. 🔗 **References**: GitHub PR #15988 and Security Advisory GHSA-hjq4-87xh-g4fv are available. ⚠️ High CVSS suggests potential for wild exploitation.

🔍 **Check**: Scan for vLLM versions 0.6.5-0.8.4. 📡 **Feature**: Look for PyNcclPipe usage in KV cache transport. 🛠️ **Tool**: Use SAST/DAST tools detecting CWE-502 in Python deserialization contexts.

✅ **Fixed**: Yes. 📝 **Patch**: Commit 0d6e187e88874c39cda7409cf673f9e6546893e7. 🔗 **Link**: See GitHub PR #15988 for the fix details. 📚 **Docs**: Check vLLM security docs for mitigation steps.

🚧 **Workaround**: If unpatched, restrict TCPStore access scope manually. 🚫 **Mitigation**: Disable PyNcclPipe if not strictly needed. 🛡️ **Network**: Isolate vLLM instances from untrusted networks immediately.

🔥 **Urgency**: CRITICAL. 🚨 **Priority**: P0. ⚡ **Action**: Patch immediately. CVSS 9.8 + No Auth Required = Immediate threat. 🏃‍♂️ Update to patched version ASAP.