---
id: CVE-2026-93683
title: A flaw was found in the DPDK vhost library
summary: >-
  A flaw was found in the DPDK vhost library. When handling a virtio indirect
  descriptor table, the host reads the table length more than once from guest
  memory and can allocate a host copy before validating that length. A guest
  that chang…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:H'
cwe:
  - CWE-367
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T20:13:37.910'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93683'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-93683'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2537015'
    label: secalert@redhat.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-14T16:40:32.135Z'
vendor: Red Hat
product: openvswitch3.5
affected:
  - 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)
  - 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)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-14T17:43:19.198776Z'
---

## Overview

A flaw was found in the DPDK vhost library. When handling a virtio indirect descriptor table, the host reads the table length more than once from guest memory and can allocate a host copy before validating that length. A guest that changes the length between those reads, or that supplies an out-of-range next index on a small host copy in the vDPA relay path, can cause the host vhost process to walk past the validated mapping or heap copy. That can crash or disrupt the vhost process. Out-of-bounds bytes are consumed as descriptor fields for GPA translation and are not returned to the guest as payload. This is a residual issue in the non-contiguous indirect descriptor copy path introduced as part of the CVE-2018-1059 fix.

## Remediation

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