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CVE-2026-116180 vLLM from 0.8.5 before 0.31.0 has a denial of service flaw

Description

vLLM from 0.8.5 before 0.31.0 has a denial of service flaw. LogprobsTensors.empty_cpu() in vllm/v1/outputs.py allocates an uninitialized int32 tensor, and the V1 model runner leaves prompt positions reported as computed by a KV connector unwritten. A client sharing the engine can send prompt_logprobs (or echo with logprobs) against a connector-cached prefix, making tokenizer decode raise OverflowError, which crashes EngineCore and drops all co-tenant requests.

Produits et versions touchés

Produit Versions touchées Corrigé en
vllm 0.31 premières → < 0.31.0 0.31.0
vllm 0.8 0.8.5 → < 0.31.0 0.31.0

Références

Chronologie

  1. Publiée
  2. Dernière modification

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