CVE-2026-93841CWE-129

CVE-2026-93841

Low · published September 19, 2026

CVSS v3.1
3.7
EPSS
0%
Percentile
13.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.7 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
6.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00237 · 13.9th percentile
Weakness
CWE-129 · Improper Validation of Array Index
Published
2026-09-19T00:17Z
Affected products (1)
ProductVersionsFixed in
vllm/vllm≤ 0.29.0—
References (5)
https://github.com/vllm-project/vllm · [email protected]https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/v1/worker/gpu/sample/penalties.py#L241-L255 · [email protected]https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/v1/worker/gpu/sample/penalties.py#L33-L37 · [email protected]https://github.com/vllm-project/vllm/pull/49081 · [email protected]https://www.vulncheck.com/advisories/vllm-through-0.29.0-adjacent-request-sampler-state-corruption-via-unvalidated-prompt-token-ids · [email protected]
EPSS history
Timeline
  • 20 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 18 SEP 19:06Z
    vLLM through 0.29.0 Adjacent-Request Sampler State Corruption via Unvalidated Prompt Token IDs
    cvelistv5