CVE-2026-86561 Dpdk: dpdk: missing memory size validation before mmap in vhost memory region setup
Missing memory size validation in DPDK vhost allows attackers to cause host crashes or memory corruption during region setup.
- 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-2026-86561?
CVE-2026-86561 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 DPDK lib/vhost. Memory size is not adequately validated before mmap during vhost memory-region setup, which can lead to a host crash or memory corruption.
Weakness: CWE-770
Which versions are affected by CVE-2026-86561?
How do I fix CVE-2026-86561?
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-2026-86561 being exploited?
There is no known exploitation of CVE-2026-86561 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-86561, GHSA-pwj5-mm8f-mm4p, UBUNTU-CVE-2026-86561.