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5.3 Medium

CVE-2026-73558 vLLM is an inference and serving engine for large language models

Description

vLLM is an inference and serving engine for large language models. Prior to 0.27.0, an integer overflow in blockIdx.x * 2 * d in activation_kernels.cu can cause act_and_mul_kernel to consume another batched user's input, allowing a request processed in the same inference batch to receive a partial or complete copy of another user's inference result. This issue is fixed in version 0.27.0.

Affected products and versions

Product Affected versions Fixed in
vllm 0.27 earliest → < 0.27.0 0.27.0

References

Timeline

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