Dashboard / CVE-2026-86566

CVE-2026-86566

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 38/100
Published: 2026-10-14 Modified: 2026-11-11 First seen: 2026-11-03 Status: active

Attack Surface

Low Complexity No Interaction Scope Change

CVSS Vector Breakdown

AV: Local
AC: Low
PR: Low
UI: None
S: Changed
C: None
I: None
A: High

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.

Weakness Classification (1)

References & Advisories (7)

https://access.redhat.com/errata/RHSA-2026:94629
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:94630
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:96083
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:98505
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:98616
vendor-advisory x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2529684
issue-tracking x_refsource_REDHAT

Bug Bounty Relevance

38 / 100
✓ Low complexity
✓ No user interaction

CVSS Score

6.5 / 10.0 v3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

EPSS — Exploitation Probability

0.17%
Raw Score 0.001710
Percentile 6.6%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00171
2026-11-13
0.00171
2026-11-12
0.00171
2026-11-10
0.00171
2026-11-09
0.00171
2026-11-08
0.00171
2026-11-07
0.00171
2026-11-06
0.00171
2026-11-05
0.00171
2026-11-04
0.00177
2026-11-03
0.00165

Intelligence Sources

mitre ref →
nvd ref →

External Links