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VULNERABILITIES

CVE-2026-93841 Details

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.

Metrics

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/vllm-project/vllm [email protected]Product
https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/v1/worker/gpu/sample/penalties.py#L241-L255 [email protected]Product
https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/v1/worker/gpu/sample/penalties.py#L33-L37 [email protected]Product
https://github.com/vllm-project/vllm/pull/49081 [email protected]Issue TrackingPatch
https://www.vulncheck.com/advisories/vllm-through-0.29.0-adjacent-request-sampler-state-corruption-via-unvalidated-prompt-token-ids [email protected]Third Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-129Improper Validation of Array Index[email protected]

Affected Products

ProductVersions
vllm vllm
<= 0.29.0

CPE

  • cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-93841
NVD Published Date:
Sep 18, 2026
NVD Last Modified:
Sep 28, 2026
Source:
[email protected]
CVE-2026-93841 Details - Not Deferred