CVE-2026-86566

A flaw was found in DPDK lib/vhost

Risk score: 40/100
CVSS: 6.5 v3.1
Exploit chance (30 days): 0.2%
Published: 14 Oct 2026

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What to know

What it is: 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: See advisory
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Why it is Yellow

CVSS 6.5 medium

References

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

Original 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.

Last activity 14 Oct 2026. Patch Forecast updates every hour.