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CVE-2026-73558 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/vllm-project/vllm/security/advisories/GHSA-7m6h-x95x-82q5	CISA-ADP
https://github.com/vllm-project/vllm/commit/451227cb3ff07989698fed982c2d3e4300257924	[email protected]
https://github.com/vllm-project/vllm/issues/42860	[email protected]
https://github.com/vllm-project/vllm/pull/49660	[email protected]
https://github.com/vllm-project/vllm/releases/tag/v0.27.0	[email protected]
https://github.com/vllm-project/vllm/security/advisories/GHSA-7m6h-x95x-82q5	[email protected]

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-190	Integer Overflow or Wraparound	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Aug 13, 2026	CVE Modified	CISA-ADP
Aug 13, 2026	New CVE Received	[email protected]