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Advisories

vLLM through 0.29.0 Memory Exhaustion via Unvalidated NIXL tp_size

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severity
high
date
Affecting

  • vllm <= 0.29.0

CWE
  • CWE-789 Memory Allocation with Excessive Size Value
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
Mingkai Yu, Jiapeng Li, Jiajia Liu
Description
vLLM through 0.29.0 fails to validate the tp_size parameter in kv_transfer_params on OpenAI-compatible completion endpoints, allowing attackers to allocate unbounded memory. Attackers can supply arbitrary tp_size values in prefill/decode disaggregated deployments to exhaust memory and trigger kernel OOM-kill of the decode worker process.

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