CVE-2026-93841: vLLM memory corruption in Triton _bincount_kernel via prompt token IDs

Summary

vLLM through 0.29.0 has a memory corruption flaw in the Triton _bincount_kernel. Prompt token IDs index the penalty prompt-presence bitset without bounds checking against vocabulary size. An attacker can submit multimodal audio requests with tokens equal to vocabulary size, causing out-of-bounds writes that corrupt concurrent requests' sampler state and alter repetition penalty behavior.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Topics

• Inference infrastructure

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