CVE-2026-86565 Dpdk: dpdk: guest can desynchronize virtqueue size from inflight descriptor table size, causing out-of-bounds write
A guest VM can trigger an out-of-bounds write in the host vhost process by desynchronizing virtqueue sizes, potentially leading to code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-86565?
CVE-2026-86565 is a high-severity memory corruption vulnerability in Red Hat Fast Datapath for RHEL 10, published on 14 Oct 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. A guest can desynchronize virtqueue size from inflight descriptor table size, causing an out-of-bounds write in the host vhost process.
Weakness: CWE-787
Which versions are affected by CVE-2026-86565?
How do I fix CVE-2026-86565?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-86565 being exploited?
There is no known exploitation of CVE-2026-86565 in the wild and no public exploit code.
Sources
Also known as AZL-108333, DEBIAN-CVE-2026-86565, GHSA-frh8-6rpp-rx74, UBUNTU-CVE-2026-86565.