← Vulnerability feed

Vulnerability record · CVE-2026-94627 · published 21 September 2026

CVE-2026-94627: Memory leak vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.63% · top 51.9% CWE-401 · Memory leak Awaiting Analysis
8.7CVSS 4.0 base score
0.63%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
22 Sep 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/vllm-project/vllm
https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connect
https://github.com/vllm-project/vllm/pull/49796
https://www.vulncheck.com/advisories/vllm-through-0.29.0-gpu-kv-cache-leak-via-mooncake-transfer-id-collision

Track CVE-2026-94627 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

3.3CVE-2023-26083Arm Mali GPU Kernel Driver memory leak exposes kernel metadataThe Arm Mali GPU kernel driver has a memory leak (CWE-401) across Midgard r6p0-r32p0, Bifrost r0p0-r42p0, Valhall r19p0-r42p0, and Avalon r41p0-r42p0…KEVEPSS 1.2%analysed8.6CVE-2018-0158Cisco IOS and IOS XE IKEv2 packet handling memory leak DoSCisco IOS and IOS XE mishandle certain IKEv2 packets, causing improper input validation that leaks memory. Repeated crafted packets drive continuous …KEVEPSS 7.2%analysed

Source: NIST National Vulnerability Database (record CVE-2026-94627), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.