CVE-2026-86847 Dpdk: dpdk: guest can trigger infinite loop in vhost-crypto writeback chain cleanup
A guest can trigger an infinite loop or crash in the host vhost-crypto process by causing a mapping failure that leads to following an uninitialized pointer.
- 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-2026-86847?
CVE-2026-86847 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. Write-back chain cleanup can follow an uninitialized next pointer when mapping a guest descriptor fails, causing the host vhost-crypto process to hang or crash.
Weakness: CWE-824
Which versions are affected by CVE-2026-86847?
How do I fix CVE-2026-86847?
Apply the vendor's patch.
Is CVE-2026-86847 being exploited?
There is no known exploitation of CVE-2026-86847 in the wild and no public exploit code.
Sources
Also known as AZL-108327, DEBIAN-CVE-2026-86847, GHSA-88x8-5995-vmmf, UBUNTU-CVE-2026-86847.