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Fencer Vulns
medium 4.9

CVE-2018-17206 json

An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6.

published 2018-09-19 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-8968

cvss
4.9
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6. The decode_bundle function inside lib/ofp-actions.c is affected by a buffer over-read issue during BUNDLE action decoding.

Patch / fix

  • openvswitch Debian 14, Debian 13, Debian 12 2.10.0+2018.08.28+git.8ca7c82b7d+ds1-1

debian advisories DEBIAN-CVE-2018-17206

  • openvswitch Ubuntu 16.04 LTS 2.5.5-0ubuntu0.16.04.2
  • openvswitch Ubuntu 18.04 LTS 2.9.2-0ubuntu0.18.04.3

ubuntu advisories UBUNTU-CVE-2018-17206

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openvswitch openstack 13, openstack 10 2.9.0-83.el7fdp.1
  • openvswitch-test openstack 13, openstack 10 2.9.0-83.el7fdp.1
  • python-openvswitch openstack 13, openstack 10 2.9.0-83.el7fdp.1
  • openvswitch-ovn-host openstack 13, openstack 10 2.9.0-83.el7fdp.1
  • openvswitch-ovn-vtep openstack 13, openstack 10 2.9.0-83.el7fdp.1
  • openvswitch-ovn-common openstack 13, openstack 10 2.9.0-83.el7fdp.1
  • openvswitch-ovn-central openstack 13, openstack 10 2.9.0-83.el7fdp.1
  • openvswitch RHEL 7 2.9.0-70.el7fdp.1

red hat advisories RHSA-2019:0081RHSA-2019:0053RHSA-2018:3500

  • openvswitch SLES for SAP 12 SP3, SLES 12 SP3 2.7.6-3.23.1

suse advisories SUSE-SU-2018:4128-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-17206 updated cvss 4.9

openvswitch: Buffer over-read in lib/ofp-actions.c:decode_bundle()

  • Red Hat OpenStack Platform 8 (Liberty) openvswitch, python-openvswitch Red Hat OpenStack Platform 9 (Mitaka) openvswitch, python-openvswitch Red Hat OpenStack Platform 12 (Pike) openvswitch, openvswitch-test, python-openvswitch, openvswitch-ovn-host, openvswitch-ovn-vtep, openvswitch-ovn-common, +1 more
    affected: no fix planned “Will not fix”
  • Red Hat Virtualization 4 rhvm-appliance, redhat-virtualization-host-image-update
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat Fast Datapath for Red Hat Enterprise Linux 7 openvswitch 2.9.0-70.el7fdp.1, openvswitch-test 2.9.0-70.el7fdp.1, python-openvswitch 2.9.0-70.el7fdp.1, openvswitch-ovn-host 2.9.0-70.el7fdp.1, openvswitch-ovn-vtep 2.9.0-70.el7fdp.1, openvswitch-ovn-common 2.9.0-70.el7fdp.1, +1 more
    fixed: vendor fix RHSA-2018:3500
  • Red Hat OpenStack 10.0 Tools for RHEL 7 openvswitch-test 2.9.0-83.el7fdp.1 Red Hat OpenStack Platform 10.0 openvswitch 2.9.0-83.el7fdp.1, python-openvswitch 2.9.0-83.el7fdp.1, openvswitch-ovn-host 2.9.0-83.el7fdp.1, openvswitch-ovn-vtep 2.9.0-83.el7fdp.1, openvswitch-ovn-common 2.9.0-83.el7fdp.1, openvswitch-ovn-central 2.9.0-83.el7fdp.1
    fixed: vendor fix RHSA-2019:0053
  • Red Hat OpenStack Platform 13.0 openvswitch 2.9.0-83.el7fdp.1, openvswitch-test 2.9.0-83.el7fdp.1, python-openvswitch 2.9.0-83.el7fdp.1, openvswitch-ovn-host 2.9.0-83.el7fdp.1, openvswitch-ovn-vtep 2.9.0-83.el7fdp.1, openvswitch-ovn-common 2.9.0-83.el7fdp.1, +1 more
    fixed: vendor fix RHSA-2019:0081
  • Red Hat Virtualization 4.2 Management Agent for RHEL 7.6 EUS Hosts openvswitch 2.9.0-70.el7fdp.1, python-openvswitch 2.9.0-70.el7fdp.1, openvswitch-ovn-host 2.9.0-70.el7fdp.1, openvswitch-ovn-common 2.9.0-70.el7fdp.1
    fixed: vendor fix RHSA-2018:3500
  • Red Hat Fast Datapath for RHEL 7 openvswitch2.10, openvswitch2.10-test, python-openvswitch2.10, openvswitch2.10-ovn-host, openvswitch2.10-ovn-vtep, openvswitch2.10-ovn-common, +1 more Red Hat Fast Datapath for RHEL 8 openvswitch2.10, openvswitch2.11, openvswitch2.11-test, python3-openvswitch2.11, network-scripts-openvswitch2.11 Red Hat OpenShift Container Platform 3.2 node Red Hat OpenShift Container Platform 3.3 node Red Hat OpenShift Container Platform 3.4 node Red Hat OpenShift Enterprise 3.0 openvswitch, openvswitch-test, python-openvswitch
    +2 more products
    Red Hat OpenShift Enterprise 3.1 node Red Hat OpenStack Platform 14 (Rocky) openvswitch
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.05% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.