cve-2025-47277
Vulnerability from cvelistv5
Published
2025-05-20 17:32
Modified
2025-05-20 17:52
Severity ?
Summary
vLLM Allows Remote Code Execution via PyNcclPipe Communication Service
Impacted products
vllm-projectvllm
Show details on NVD website


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                "id": "CVE-2025-47277",
                "options": [
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                    "Exploitation": "none"
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                "timestamp": "2025-05-20T17:52:22.643444Z",
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        "title": "CISA ADP Vulnrichment"
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          "value": "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 impacts environments using the `PyNcclPipe` KV cache transfer integration with the V0 engine. No other configurations are affected. vLLM supports the use of the\u00a0`PyNcclPipe`\u00a0class to establish a peer-to-peer communication domain for data transmission between distributed nodes. The GPU-side KV-Cache transmission is implemented through the\u00a0`PyNcclCommunicator`\u00a0class, while CPU-side control message passing is handled via the\u00a0`send_obj`\u00a0and\u00a0`recv_obj`\u00a0methods on the CPU side.\u200b The intention was that this interface should only be exposed to a private network using the IP address specified by the `--kv-ip` CLI parameter. The vLLM documentation covers how this must be limited to a secured network. The default and intentional behavior from PyTorch is that the `TCPStore` interface listens on ALL interfaces, regardless of what IP address is provided. The IP address given was only used as a client-side address to use. vLLM was fixed to use a workaround to force the `TCPStore` instance to bind its socket to a specified private interface. As of version 0.8.5, vLLM limits the `TCPStore` socket to the private interface as configured."
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      "source": {
        "advisory": "GHSA-hjq4-87xh-g4fv",
        "discovery": "UNKNOWN"
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      "title": "vLLM Allows Remote Code Execution via PyNcclPipe Communication Service"
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-47277",
    "datePublished": "2025-05-20T17:32:27.034Z",
    "dateReserved": "2025-05-05T16:53:10.373Z",
    "dateUpdated": "2025-05-20T17:52:31.274Z",
    "state": "PUBLISHED"
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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.