CVE-2026-86567

dpdk: dpdk: VDUSE handler fails to invalidate vring pointers when IOTLB is invalidated, leading to use-after-unmap

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Severity

Important

Red Hat Product Security

8.8

CVSS 3.1

Review impact separately from score.

Published · October 15, 2026

Updated · November 4, 2026

Description

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.

Statement

A malicious VM with a VDUSE device can trigger this flaw via memory hot-remove, balloon inflation, or an IOMMU mapping change. Red Hat has rated this as having a security impact of Important.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is currently available.

CVSS / CWE

CVSS 3.1 · 8.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CWE-416 · Use After Free