CVE-2021-3839: Dpdk Data Plane Development Kit

High severity, CVSS 7.5. EPSS: 1.6% chance of exploitation in the next 30 days.

A flaw was found in the vhost library in DPDK. Function vhost_user_set_inflight_fd() does not validate `msg->payload.inflight.num_queues`, possibly causing out-of-bounds memory read/write. Any software using DPDK vhost library may crash as a result of this vulnerability.

Affected products

• Dpdk Data Plane Development Kit: before 22.03 (fixed in 22.03); version 22.03 only
• Fedoraproject Fedora: version 35 only
• Red Hat Enterprise Linux: version 7.0 only; version 8.0 only; version 9.0 only
• Red Hat Enterprise Linux Fast Datapath: version 7.0 only; version 8.0 only

Published 2022-08-23. Last modified 2026-06-17.