CVE-2026-86566

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.0 / Impact : 4.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References

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

Configurations

No configuration.

History

14 Oct 2026, 18:19

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-14 18:19

Updated : 2026-10-14 20:17

NVD link : CVE-2026-86566

Mitre link : CVE-2026-86566

CVE.ORG link : CVE-2026-86566

JSON object : View

Products Affected

No product.

CWE

CWE-191

Integer Underflow (Wrap or Wraparound)

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