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CVE-2018-17204

18
FAUCET Score

CVE-2018-17204 describes an assertion failure vulnerability in Open vSwitch (OvS) versions 2.7.x through 2.7.6, specifically within the OpenFlow 1.5 decoder when processing group modifications. This flaw affects various distributions including Canonical, Debian, and Red Hat. Rated as Medium severity (CVSS 4.3), it can be triggered remotely with low attack complexity by an authenticated user, leading to a denial of service. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.7.0, <= 2.7.6CPE matchmatch criteria
cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:*
10CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*
13CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.91%
Probability of exploitation in next 30 days
EPSS Percentile
77.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0191 is in the 90th percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (11)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Fast Datapath for Red Hat Enterprise Linux 7Fixed in: openvswitch-0:2.9.0-70.el7fdp.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 10.0 (Newton)Fixed in: openvswitch-0:2.9.0-83.el7fdp.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 13.0 (Queens)Fixed in: openvswitch-0:2.9.0-83.el7fdp.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4.2 for Red Hat Enterprise Linux 7.6 EUSFixed in: openvswitch-0:2.9.0-70.el7fdp.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: redhat-release-virtualization-host-0:4.2-7.5.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: redhat-virtualization-host-0:4.2-20181121.0.el7_6
View patch
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 12 (Pike)Fixed in: openvswitch
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 8 (Liberty)Fixed in: openvswitch
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 9 (Mitaka)Fixed in: openvswitch
redhatend of lifevia redhat_api
Product: Red Hat Virtualization 4Fixed in: rhvm-appliance

Vendor Advisories (1)

redhatCVE-2018-17204Moderate

openvswitch: Mishandle of group mods in lib/ofp-util.c:parse_group_prop_ntr_selection_method() allows for assertion failure

Sep 25, 2018

References

access.redhat.com / errata/RHSA-2018:3500
Third Party Advisory
access.redhat.com / errata/RHSA-2019:0053
Third Party Advisory
access.redhat.com / errata/RHSA-2019:0081
Third Party Advisory
github.com / openvswitch/ovs/commit/4af6da3b275b764b1afe194df6499b33d2bf4cde
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2021/02/msg00032.html
Mailing ListThird Party Advisory
usn.ubuntu.com / 3873-1
Third Party Advisory