CVE-2026-86564 Dpdk: dpdk: missing length validation before reading command_data in virtio-net control queue handler
A missing length validation in the DPDK virtio-net control queue handler allows an out-of-bounds read, causing a host process crash.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-86564?
CVE-2026-86564 is a low-severity denial of service vulnerability in Red Hat Fast Datapath for RHEL 10, published on 8 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2026-86564?
How do I fix CVE-2026-86564?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-86564 being exploited?
There is no known exploitation of CVE-2026-86564 in the wild and no public exploit code.
Sources
Also known as AZL-100926, DEBIAN-CVE-2026-86564, GHSA-v82g-5rfm-rj2j, UBUNTU-CVE-2026-86564.