What’s Vulnerable › Vulnerabilities

CVE-2026-86566: Dpdk: dpdk: guest with runt rx descriptors underflows copy length in vhost enqueue (split and packed rings)

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-14 · updated 2026-10-14
• Weakness: CWE-191

Description

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.

Affected products

• Red Hat Fast Datapath for RHEL 10: all versions
• Red Hat Fast Datapath for RHEL 8: all versions
• Red Hat Fast Datapath for RHEL 9: all versions
• Red Hat OpenShift Container Platform 4.18: all versions
• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions
• Red Hat OpenStack Platform 13 (Queens): all versions

References

• https://access.redhat.com/security/cve/CVE-2026-86566
• https://bugzilla.redhat.com/show_bug.cgi?id=2529684

Get alerted when CVE-2026-86566 or the next vulnerability affects your stack