CVE-2026-86849 Dpdk: dpdk: integer overflow combined with missing validation leads to host buffer overflow in vhost-crypto
An integer overflow in DPDK's vhost-crypto backend allows attackers to overflow host buffers, potentially leading to code execution or denial of service.
- 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-2026-86849?
CVE-2026-86849 is a medium-severity 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 vhost-crypto. Integer overflow in chain length checks, and missing length checks on the RSA path, can overflow a host buffer in the vhost-crypto backend.
Weakness: CWE-787
Which versions are affected by CVE-2026-86849?
How do I fix CVE-2026-86849?
Apply the vendor's patch.
Is CVE-2026-86849 being exploited?
There is no known exploitation of CVE-2026-86849 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-86849, GHSA-r5jx-c73w-845m, UBUNTU-CVE-2026-86849.