vLLM Mooncake connector through 0.29.0 fails to properly manage GPU KV cache block ownership when concurrent child requests share a single transfer ID in prefill/decode disaggregated deployments. Attackers can trigger GPU memory exhaustion by submitting completion requests with multiple prompts, causing orphaned KV cache blocks to accumulate until process restart and eventually preventing legitimate requests from executing.

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Solution

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History

Wed, 23 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-772
References
Metrics threat_severity

None

threat_severity

Important


Tue, 22 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 21 Sep 2026 22:15:00 +0000

Type Values Removed Values Added
Description vLLM Mooncake connector through 0.29.0 fails to properly manage GPU KV cache block ownership when concurrent child requests share a single transfer ID in prefill/decode disaggregated deployments. Attackers can trigger GPU memory exhaustion by submitting completion requests with multiple prompts, causing orphaned KV cache blocks to accumulate until process restart and eventually preventing legitimate requests from executing.
Title vLLM through 0.29.0 GPU KV Cache Leak via Mooncake Transfer ID Collision
First Time appeared Vllm
Vllm vllm
Weaknesses CWE-401
CPEs cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*
Vendors & Products Vllm
Vllm vllm
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-22T12:51:23.062Z

Reserved: 2026-09-21T21:42:30.080Z

Link: CVE-2026-94627

cve-icon Vulnrichment

Updated: 2026-09-22T12:51:18.153Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-21T22:17:01.740

Modified: 2026-09-22T20:25:55.870

Link: CVE-2026-94627

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-21T22:04:16Z

Links: CVE-2026-94627 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-22T03:30:17Z

Weaknesses