CVE-2018-14635

When using the Linux bridge ml2 driver, non-privileged tenants are able to create and attach ports without specifying an IP address, bypassing IP address validation. A potential denial of service could occur if an IP address, conflicting with existing guests or routers, is then assigned from outside of the allowed allocation pool. Versions of openstack-neutron before 13.0.0.0b2, 12.0.3 and 11.0.5 are vulnerable.

Published: 2018-09-10 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-14635 is rated Moderate Risk (57.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.53%). EPSS rose +2.22% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-14635

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.31% 2.53% +2.22%
2 2025-12-14 0.40% 0.31% -0.10%
3 2025-11-21 — 0.40% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-14635

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
6.5 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2018-14635

GitHub Security Advisory for CVE-2018-14635

GHSA-x634-34m9-96mp · Severity: high · Ecosystem: pip — OpensStack Neutron Denial of Service Vulnerability

OS Trackers for CVE-2018-14635

vendor priority summary link
debian not yet assigned CVE-2018-14635 not yet assigned priority: Debian including 1 source packages (neutron), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-14635
redhat medium — https://access.redhat.com/security/cve/CVE-2018-14635
suse medium CVE-2018-14635 severity moderate: SUSE including 11 source package names (openstack-neutron, openstack-neutron-dhcp-agent, …), 33 product×package rows across 3 product lines (HPE Helion OpenStack 8, SUSE OpenStack Cloud 8, SUSE OpenStack Cloud Crowbar 8): Known Not Affected 33. https://www.suse.com/security/cve/CVE-2018-14635/
ubuntu negligible CVE-2018-14635 negligible priority: Ubuntu including 1 source packages (neutron), 19 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 15, released 2, DNE 1, needed 1. https://ubuntu.com/security/CVE-2018-14635

Affected software / configurations for CVE-2018-14635

Vendor Product Version Raw CPE
redhat openstack 10 cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*
redhat openstack 12 cpe:2.3:a:redhat:openstack:12:*:*:*:*:*:*:*
redhat openstack 13 cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*
openstack neutron >= 11.0.0, <= 11.0.5 cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
openstack neutron >= 12.0.0, <= 12.0.3 cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
openstack neutron 13.0.0.0 cpe:2.3:a:openstack:neutron:13.0.0.0:b1:*:*:*:*:*:*

References for CVE-2018-14635

cvelogic Threat Intelligence