CVE record · CVE-2026-34956

Openvswitch: open vswitch: denial of service via malformed ftp epasv command

CVSS 5.9 MediumEPSS 0.0040 · 34th percentile

Published by the CVE Program (CNA: redhat) at 5 May 2026, 15:45 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Red Hat	Fast Datapath for RHEL 7 Package name: openvswitch https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 7 Package name: openvswitch2.10 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 7 Package name: openvswitch2.11 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 7 Package name: openvswitch2.12 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 7 Package name: openvswitch2.13 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 7 Package name: openvswitch-selinux-extra-policy https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 7 Package name: ovn2.11 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 7 Package name: ovn2.12 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 8 Package name: openvswitch2.11 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 8 Package name: openvswitch2.12 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 8 Package name: openvswitch2.13 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 8 Package name: openvswitch2.15 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 8 Package name: openvswitch2.16 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 8 Package name: openvswitch2.17 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 8 Package name: openvswitch3.1 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 8 Package name: openvswitch-selinux-extra-policy https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 8 Package name: ovn2.11 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 8 Package name: ovn2.12 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 9 Package name: openvswitch2.17 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 9 Package name: openvswitch3.0 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 9 Package name: openvswitch3.1 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 9 Package name: openvswitch3.2 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 9 Package name: openvswitch3.3 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 9 Package name: openvswitch3.4 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 9 Package name: openvswitch3.5 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 9 Package name: openvswitch3.6 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Fast Datapath for RHEL 9 Package name: openvswitch-selinux-extra-policy https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat Enterprise Linux 7 Package name: openvswitch https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4 Package name: openshift/ose-rhel-coreos-8 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4 Package name: openvswitch2.17 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4 Package name: openvswitch3.0 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4 Package name: openvswitch3.1 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenStack Platform 13 (Queens) Package name: rhosp13/openstack-neutron-openvswitch-agent https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenStack Platform 13 (Queens) Package name: rhosp13/openstack-openvswitch-base https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenStack Platform 13 (Queens) Package name: rhosp13/openstack-ovn-base https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenStack Platform 16.2 Package name: rhosp-openvswitch https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenStack Platform 16.2 Package name: rhosp-rhel8/openstack-neutron-openvswitch-agent https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenStack Platform 17.1 Package name: rhosp-openvswitch https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenStack Platform 17.1 Package name: rhosp-rhel9/openstack-neutron-openvswitch-agent https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected

And 1 more products. The full list is on the CVE record.

Identifiers: CVE-2026-34956
CNA: redhat
Weakness (CWE): CWE-120
Tags: Red Hat Fast Datapath for RHEL 7
Red Hat Fast Datapath for RHEL 8
Red Hat Fast Datapath for RHEL 9
Red Hat Enterprise Linux 7
Red Hat OpenShift Container Platform 4
Red Hat OpenStack Platform 13 (Queens)
Red Hat OpenStack Platform 16.2
Red Hat OpenStack Platform 17.1
Memory corruption
Published: 5 May 2026
Updated: 5 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.9	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (redhat)

CISA KEV Not listed.
EPSS 0.0040, the 34th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

5 May 2026, 15:45 UTC Confirmed by the CVE List
5 May 2026, 16:16 UTC Confirmed by NVD

Sources

References from the CNA

access.redhat.com/security/cve/CVE-2026-34956 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2453459 issue-trackingredhat

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.