CVE-2026-86567 Dpdk: dpdk: vduse handler fails to invalidate vring pointers when iotlb is invalidated, leading to use-after-unmap
Attackers can trigger a use-after-unmap in the DPDK VDUSE handler by invalidating the IOTLB, potentially causing crashes or code execution.
- 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-2026-86567?
CVE-2026-86567 is a high-severity use after free 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. The VDUSE handler fails to invalidate vring pointers when the IOTLB is invalidated, leading to use-after-unmap.
Weakness: CWE-416
Which versions are affected by CVE-2026-86567?
How do I fix CVE-2026-86567?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-86567 being exploited?
There is no known exploitation of CVE-2026-86567 in the wild and no public exploit code.
Sources
Also known as AZL-108336, DEBIAN-CVE-2026-86567, GHSA-88xm-vmg5-3cxm, UBUNTU-CVE-2026-86567.