Medium severity · published Oct 14, 2026
CVE-2026-86566
Dpdk: dpdk: guest with runt rx descriptors underflows copy length in vhost enqueue (split and packed rings)
6.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FD
Fast Datapath for RHEL 10 · Red Hat
All versions, or not specified · source: vendor
FD
Fast Datapath for RHEL 8 · Red Hat
All versions, or not specified · source: vendor
FD
Fast Datapath for RHEL 9 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenStack Platform 13 (Queens) · Red Hat
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86566
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-86566
vdb-entry
https://access.redhat.com/security/cve/CVE-2026-86566
issue-tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2529684
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