CVE-2019-10876

An issue was discovered in OpenStack Neutron 11.x before 11.0.7, 12.x before 12.0.6, and 13.x before 13.0.3. By creating two security groups with separate/overlapping port ranges, an authenticated user may prevent Neutron from being able to configure networks on any compute nodes where those security groups are present, because of an Open vSwitch (OVS) firewall KeyError. All Neutron deployments utilizing neutron-openvswitch-agent are affected.

Published: 2019-04-05 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-10876 is rated Moderate Risk (53.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.76%). EPSS rose +1.11% 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-2019-10876

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 0.65% 1.76% +1.11%
2 2026-01-19 0.66% 0.65% -0.01%
3 2025-12-29 — 0.66% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-10876

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:H/I:N/A:N 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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 3.6 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:N/A:N 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:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2019-10876

GitHub Security Advisory for CVE-2019-10876

GHSA-jr9m-v5qh-mh2j · Severity: high · Ecosystem: pip — OpenStack Neutron overlapping security group rules prevents compute node network configuration

OS Trackers for CVE-2019-10876

vendor priority summary link
debian not yet assigned CVE-2019-10876 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-2019-10876
redhat medium — https://access.redhat.com/security/cve/CVE-2019-10876
suse high CVE-2019-10876 severity important: SUSE including 435 source package names (ardana-ansible-8.0+git.1553878455.7439e04-3.61.1, ardana-ansible-9.0+git.1560211997.7ac9792-3.3.5, …), 930 product×package rows across 6 product lines (HPE Helion OpenStack 8, SUSE OpenStack Cloud 7, … (6 product lines)): Fixed 919, Known Not Affected 11. https://www.suse.com/security/cve/CVE-2019-10876/
ubuntu medium CVE-2019-10876 medium priority: Ubuntu including 1 source packages (neutron), 6 status rows across 6 suites (bionic, cosmic, disco, trusty, upstream, xenial): released 3, not-affected 2, DNE 1. https://ubuntu.com/security/CVE-2019-10876

Affected software / configurations for CVE-2019-10876

Vendor Product Version Raw CPE
openstack neutron >= 11.0.0, < 11.0.7 cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
openstack neutron >= 12.0.0, < 12.0.6 cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
openstack neutron >= 13.0.0, < 13.0.3 cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
redhat openstack 13 cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*
redhat openstack 14 cpe:2.3:a:redhat:openstack:14:*:*:*:*:*:*:*

References for CVE-2019-10876

cvelogic Threat Intelligence