CVE-2026-93841
Low
Description
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.
SeverityLow
CVSS3.7
Exploit probability—
ProductVllm
PublishedSep 18, 2026
First seenSep 18, 2026
Weakness typeCWE-129CWE-129
How to fix
Update
- vllm0.30.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vllm vllm | v ≤ 0.29.0 | — |
| vllmPyPI | v < 0.30.0 | 0.30.0 |
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