gcdRadar
archive/Patch now/AIR-2026-0156
closedclosed 21 Sep 2026Patch now2 Disclosed vulnerabilityAI

vLLM Mooncake connector GPU memory exhaustion vulnerability

vLLM

The vLLM Mooncake connector fails to properly manage GPU KV cache block ownership when concurrent child requests share transfer IDs. Attackers can cause GPU memory exhaustion by accumulating orphaned cache blocks until process restart.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
8.7
EPSS
0.01 · top 50% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
21 Sep 2026
last update
21 Sep 2026
CVE ids
CVE-2026-94627other records

Timeline · 1

  1. 21 Sep 2026CVE-2026-94627: vLLM Mooncake connector through 0.29.0 fails to properly manage GPU KV cache block ownership when concurrent child requests share…

Sources · 1

Advisories and databases

  1. 2026-09-21
    CVE-2026-94627: vLLM Mooncake connector through 0.29.0 fails to properly manage GPU KV cache block ownership when concurrent child requests share…
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-94627

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
vllmmemory-exhaustion
dates
happened 21 Sep 2026 · first reported 21 Sep 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# vLLM Mooncake connector GPU memory exhaustion vulnerability

https://gcdradar.vercel.app/incidents/vllm-mooncake-connector-gpu-memory-exhaustion-vulnerability · AIR-2026-0156 · closed 2026-09-21

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-09-21
- AI role: Attack on AI
- Products: vLLM
- CVE ids: CVE-2026-94627
- CVSS: 8.7

## Summary

The vLLM Mooncake connector fails to properly manage GPU KV cache block ownership when concurrent child requests share transfer IDs. Attackers can cause GPU memory exhaustion by accumulating orphaned cache blocks until process restart.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-09-21: CVE-2026-94627: vLLM Mooncake connector through 0.29.0 fails to properly manage GPU KV cache block ownership when concurrent child requests share… (https://nvd.nist.gov/vuln/detail/CVE-2026-94627)

## Sources

- 2026-09-21 NVD: CVE-2026-94627: vLLM Mooncake connector through 0.29.0 fails to properly manage GPU KV cache block ownership when concurrent child requests share… https://nvd.nist.gov/vuln/detail/CVE-2026-94627

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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