CVE-2026-93841

vLLM through 0.29.0 contains a memory corruption vulnerability in the Triton _bincount_kernel where prompt token IDs index the penalty prompt-presence bitset without bounds checking against vocabulary size. Attackers 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.

• https://github.com/vllm-project/vllm
• https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/v1/worker/gpu/sample/penalties.py#L241-L255
• https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/v1/worker/gpu/sample/penalties.py#L33-L37
• https://github.com/vllm-project/vllm/pull/49081

• https://github.com/vllm-project/vllm
• https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/v1/worker/gpu/sample/penalties.py#L241-L255
• https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/v1/worker/gpu/sample/penalties.py#L33-L37
• https://github.com/vllm-project/vllm/pull/49081
• https://www.vulncheck.com/advisories/vllm-through-0.29.0-adjacent-request-sampler-state-corruption-via-unvalidated-prompt-token-ids

• MEDIUMCVE-2026-100654PoC
• MEDIUMCVE-2026-100836PoC
• LOWCVE-2026-102822PoC
• UNSCOREDCVE-2026-16651PoC
• MEDIUMCVE-2026-17413
• HIGHCVE-2026-61695PoC
• MEDIUMCVE-2026-62866PoC
• MEDIUMCVE-2026-63420PoC

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