# CVE-2026-86564: DPDK lib/vhost out-of-bounds read in virtio-net control-queue handler

Source: https://junglewise.ai/threats/cve-2026-86564-dpdk-lib-vhost-out-of-bounds-read-in-virtio-net-control-queue  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-86564 · Severity: low · CVSS 3.3 · Published 2026-09-08

DPDK is a data plane development kit used in high-performance networking applications. A missing validation check in the virtio-net control-queue handler can allow a malicious guest to trigger an out-of-bounds memory read, causing the host process to crash and result in service unavailability.

Technologies: [DPDK](https://junglewise.ai/threats/technologies/dpdk). Vendors: [DPDK](https://junglewise.ai/threats/vendors/dpdk).

## Quick answers

**Is CVE-2026-86564 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-86564 being exploited in the wild.

**How severe is CVE-2026-86564?** Low severity, with a CVSS score of 3.3, published 8 September 2026.

**Which products and versions are affected?** DPDK <unknown>.

**Is there a fix for CVE-2026-86564?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-86564 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-86564?** Check whether you run DPDK at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is an out-of-bounds read vulnerability (CWE-125) in DPDK's lib/vhost component, specifically in the virtio-net control-queue handler. The flaw stems from missing length validation before reading command_data, allowing an attacker to read memory beyond allocated buffer boundaries. Attack vector is local; a malicious guest with access to the VDUSE virtio-net control virtqueue can trigger this flaw. Successful exploitation causes a host process crash (denial of service), and the out-of-bounds read may also leak sensitive information such as memory addresses. No mitigation is currently available; a patch is expected from the DPDK project.

## Affected products

- DPDK DPDK <unknown>

## Timeline

- 2026-09-08: disclosed

## References

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://access.redhat.com/security/cve/CVE-2026-86564](https://access.redhat.com/security/cve/CVE-2026-86564)

## Related threats

- [DPDK vhost-crypto integer overflow in lib/vhost](https://junglewise.ai/threats/cve-2026-86849-a-flaw-was-found-in-dpdk-lib-vhost-vhost-crypto-integer-overflow)
- [DPDK vhost-crypto indirect-descriptor double-fetch out-of-bounds](https://junglewise.ai/threats/cve-2026-86848-a-flaw-was-found-in-dpdk-lib-vhost-vhost-crypto-the-indirect)
- [DPDK vhost-crypto uninitialized pointer in write-back chain](https://junglewise.ai/threats/cve-2026-86847-a-flaw-was-found-in-dpdk-lib-vhost-vhost-crypto-write-back-chain)
- [DPDK vhost-crypto out-of-bounds write via unchecked descriptor index](https://junglewise.ai/threats/cve-2026-86846-a-flaw-was-found-in-dpdk-lib-vhost-vhost-crypto-a-guest-can)
- [DPDK lib/vhost use-after-free in VDUSE handler](https://junglewise.ai/threats/cve-2026-86567-a-flaw-was-found-in-dpdk-lib-vhost-the-vduse-handler-fails-to)