CVE-2026-93841: Vllm

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Vllm Vllm: up to and including 0.29.0

Published 2026-09-18. Last modified 2026-09-28.