---
id: CVE-2026-86567
title: A flaw was found in DPDK lib/vhost
summary: >-
  A flaw was found in DPDK lib/vhost. The VDUSE handler fails to invalidate
  vring pointers when the IOTLB is invalidated, leading to use-after-unmap.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: Red Hat
product: grout
affected:
  - grout (all versions)
  - openvswitch3.5 (all versions)
  - openvswitch3.6 (all versions)
  - openvswitch2.11 (all versions)
  - openvswitch2.12 (all versions)
  - openvswitch2.13 (all versions)
  - openvswitch2.15 (all versions)
  - openvswitch2.16 (all versions)
  - openvswitch2.17 (all versions)
  - openvswitch3.1 (all versions)
  - grout (all versions)
  - openvswitch2.17 (all versions)
  - openvswitch3.0 (all versions)
  - openvswitch3.1 (all versions)
  - openvswitch3.2 (all versions)
  - openvswitch3.3 (all versions)
  - openvswitch3.4 (all versions)
  - openvswitch3.5 (all versions)
  - openvswitch3.6 (all versions)
  - dpdk (all versions)
  - dpdk (all versions)
  - dpdk (all versions)
  - openvswitch2.17 (all versions)
  - openvswitch3.0 (all versions)
  - openvswitch3.1 (all versions)
  - openvswitch (all versions)
published: '2026-10-14'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T16:18:22.257'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86567'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-86567'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2529685'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-86567.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-86567'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86567'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T15:09:51.246480Z'
ingestedAt: '2026-10-14T18:47:39.317Z'
epss: 0.00147
epssPercentile: 0.03891
---

## Overview

A flaw was found in DPDK lib/vhost. The VDUSE handler fails to invalidate vring pointers when the IOTLB is invalidated, leading to use-after-unmap.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Important · affected: Fast Datapath for RHEL 10, Fast Datapath for RHEL 8, Fast Datapath for RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · no fix planned: Fast Datapath for RHEL 8, Fast Datapath for RHEL 9, Fast Datapath for RHEL 10, Red Hat Enterprise Linux 10, … · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-86567.json)