---
id: CVE-2026-94624
title: >-
  vLLM through 0.29.0 contains a denial of service vulnerability in P2P KV
  offloading when OffloadingConnector is configured with TieringOffloadingSpec
  and a peer-to-peer secondary tier
summary: >-
  vLLM through 0.29.0 contains a denial of service vulnerability in P2P KV
  offloading when OffloadingConnector is configured with TieringOffloadingSpec
  and a peer-to-peer secondary tier. Attackers can supply arbitrary remote host
  and port …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-770
  - CWE-772
vendor: vllm-project
product: vllm
affected:
  - vllm <= 0.29.0
published: '2026-09-21'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T20:25:55.870'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-94624'
references:
  - url: 'https://github.com/vllm-project/vllm'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/v1/kv_offload/tiering/p2p/control/zmq.py#L240-L260
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/v1/kv_offload/tiering/p2p/manager.py#L667-L677
    label: disclosure@vulncheck.com
  - url: 'https://github.com/vllm-project/vllm/pull/51504'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/vllm-through-0.29.0-denial-of-service-via-unbounded-p2p-kv-offloading-sessions
    label: disclosure@vulncheck.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-94624.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-94624'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2539021'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-94624'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-94624'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.0063
epssPercentile: 0.47976
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-22T13:26:32.508111Z'
ingestedAt: '2026-09-21T22:54:37.973Z'
---

## Overview

vLLM through 0.29.0 contains a denial of service vulnerability in P2P KV offloading when OffloadingConnector is configured with TieringOffloadingSpec and a peer-to-peer secondary tier. Attackers can supply arbitrary remote host and port values in kv_transfer_params to create unreachable peer sessions that retain ZeroMQ sockets until the context quota is exhausted, causing an uncaught ZMQError that crashes EngineCore and stops all inference.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI) · no fix planned: Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI) · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-94624.json)