CVE-2018-17204
An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6, affecting parse_group_prop_ntr_selection_method in lib/ofp-util.c.
Does this matter?
Lower severity and a low EPSS score (1.91%). Track it; it rarely justifies an emergency change on its own.
Description
An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6, affecting parse_group_prop_ntr_selection_method in lib/ofp-util.c. When decoding a group mod, it validates the group type and command after the whole group mod has been decoded. The OF1.5 decoder, however, tries to use the type and command earlier, when it might still be invalid. This causes an assertion failure (via OVS_NOT_REACHED). ovs-vswitchd does not enable support for OpenFlow 1.5 by default.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 1.91% probability · 80th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-617
- Affected
- openvswitch/openvswitch · redhat/openstack · canonical/ubuntu linux · debian/debian linux
- Source
- cve@mitre.org
EPSS 1.9% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://access.redhat.com/errata/RHSA-2018:3500Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0053Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0081Third Party Advisory
- https://github.com/openvswitch/ovs/commit/4af6da3b275b764b1afe194df6499b33d2bf4cdePatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00032.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3873-1/Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3500Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0053Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0081Third Party Advisory
- https://github.com/openvswitch/ovs/commit/4af6da3b275b764b1afe194df6499b33d2bf4cdePatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00032.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3873-1/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.