CVE-2026-86848 Dpdk: dpdk: time-of-check/time-of-use vulnerability allowing guest-triggered out-of-bounds write in vhost-crypto
A time-of-check/time-of-use race condition in DPDK vhost-crypto allows a malicious guest to trigger an out-of-bounds write in the host backend.
- 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-2026-86848?
CVE-2026-86848 is a high-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. The indirect-descriptor snapshot double-fetches a guest descriptor next index, allowing a malicious guest to cause an out-of-bounds access in the host backend.
Weakness: CWE-367
Which versions are affected by CVE-2026-86848?
How do I fix CVE-2026-86848?
Apply the vendor's patch.
Is CVE-2026-86848 being exploited?
There is no known exploitation of CVE-2026-86848 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-86848, GHSA-rr86-5jrg-p5m3, UBUNTU-CVE-2026-86848.