CVE-2026-86566

MEDIUM 6.5

Dpdk: dpdk: guest with runt rx descriptors underflows copy length in vhost enqueue (split and packed rings)

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

A flaw was found in DPDK lib/vhost. A guest with runt RX descriptors can underflow the copy length in vhost enqueue, causing a denial of service in a shared vhost backend such as OVS-DPDK.

CWE	CWE-191
Vendor	red hat
Product	fast datapath for rhel 10
Published	Oct 14, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

Red Hat / Fast Datapath for RHEL 10

All versions affected

Red Hat / Fast Datapath for RHEL 10

All versions affected

Red Hat / Fast Datapath for RHEL 10

All versions affected

Red Hat / Fast Datapath for RHEL 8

All versions affected

Red Hat / Fast Datapath for RHEL 8

All versions affected

Red Hat / Fast Datapath for RHEL 8

All versions affected

Red Hat / Fast Datapath for RHEL 8

All versions affected

Red Hat / Fast Datapath for RHEL 8

All versions affected

Red Hat / Fast Datapath for RHEL 8

All versions affected

Red Hat / Fast Datapath for RHEL 8

All versions affected