CVE-2026-86856 Dpdk: dpdk: stack and heap buffer overflow in nfp vdpa driver
A buffer overflow in the DPDK nfp vDPA driver allows attackers to cause host crashes or memory corruption by configuring multiple virtqueues.
- 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-2026-86856?
CVE-2026-86856 is a medium-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 the DPDK nfp vDPA driver. Stack and heap buffers sized for a single queue pair can be overflowed when more virtqueues are configured, leading to a host crash or memory corruption.
Weakness: CWE-787
Which versions are affected by CVE-2026-86856?
How do I fix CVE-2026-86856?
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-2026-86856 being exploited?
There is no known exploitation of CVE-2026-86856 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-86856, GHSA-hw7m-fvc7-m65f, UBUNTU-CVE-2026-86856.