UBUNTU-CVE-2026-50266

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Source
https://ubuntu.com/security/CVE-2026-50266
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50266.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-50266
Upstream
Published
2026-06-04T17:16:00Z
Modified
2026-09-02T13:15:03Z
Severity
  • 2.2 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

In OpenStack Neutron before 28.0.1, a project manager can create or update a port on a shared network owned by another project and set device_owner to a value that has "network:" at the beginning ("network:dhcp" for example). The default port RBAC policies incorrectly included PROJECT_MANAGER without requiring network ownership, allowing any project manager to obtain trusted network-service port behavior on shared networks. Depending on backend and deployment, this can bypass anti-spoofing and security group protections, enabling DHCP, MAC, or IP spoofing against other tenants on the shared network. This is a regression of CVE-2015-5240 (OSSA-2015-018).

References

Affected packages

Ubuntu:16.04:LTS
neutron

Package

Name
neutron
Purl
pkg:deb/ubuntu/neutron?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2:7.*
2:7.0.0-0ubuntu1
2:8.*
2:8.0.0~b1-0ubuntu2
2:8.0.0~b2-0ubuntu4
2:8.0.0~b2-0ubuntu5
2:8.0.0~b2-0ubuntu7
2:8.0.0~b3-0ubuntu1
2:8.0.0~rc1-0ubuntu1
2:8.0.0-0ubuntu1
2:8.1.0-0ubuntu0.16.04.2
2:8.1.2-0ubuntu1
2:8.2.0-0ubuntu1
2:8.3.0-0ubuntu1
2:8.3.0-0ubuntu1.1
2:8.3.0-0ubuntu1.2
2:8.4.0-0ubuntu1
2:8.4.0-0ubuntu2
2:8.4.0-0ubuntu3
2:8.4.0-0ubuntu4
2:8.4.0-0ubuntu5
2:8.4.0-0ubuntu6
2:8.4.0-0ubuntu7.1
2:8.4.0-0ubuntu7.2
2:8.4.0-0ubuntu7.3
2:8.4.0-0ubuntu7.4
2:8.4.0-0ubuntu7.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "neutron-bgp-dragent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-common",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-dhcp-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-l3-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-linuxbridge-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-macvtap-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-metadata-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-metering-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-openvswitch-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-plugin-linuxbridge-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-plugin-ml2",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-plugin-openvswitch-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-plugin-sriov-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-server",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "neutron-sriov-agent",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        },
        {
            "binary_name": "python-neutron",
            "binary_version": "2:8.4.0-0ubuntu7.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50266.json"
Ubuntu:18.04:LTS
neutron

Package

Name
neutron
Purl
pkg:deb/ubuntu/neutron?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2:11.*
2:11.0.1-0ubuntu1
2:12.*
2:12.0.0~b1-0ubuntu1
2:12.0.0~b1-0ubuntu2
2:12.0.0~b2-0ubuntu1
2:12.0.0~b3-0ubuntu1
2:12.0.0~rc1-0ubuntu1
2:12.0.0~rc2-0ubuntu1
2:12.0.0-0ubuntu1
2:12.0.0-0ubuntu1.1
2:12.0.0-0ubuntu1.2
2:12.0.0-0ubuntu1.3
2:12.0.0-0ubuntu1.4
2:12.0.0-0ubuntu2
2:12.0.0-0ubuntu3
2:12.0.1-0ubuntu1
2:12.0.1-0ubuntu1.1
2:12.0.2-0ubuntu1
2:12.0.3-0ubuntu1
2:12.0.5-0ubuntu1
2:12.0.5-0ubuntu4
2:12.0.5-0ubuntu5
2:12.0.6-0ubuntu1
2:12.0.6-0ubuntu2
2:12.0.6-0ubuntu3
2:12.1.0-0ubuntu1
2:12.1.1-0ubuntu1
2:12.1.1-0ubuntu2
2:12.1.1-0ubuntu3
2:12.1.1-0ubuntu4
2:12.1.1-0ubuntu7
2:12.1.1-0ubuntu8
2:12.1.1-0ubuntu8.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "neutron-common",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "neutron-dhcp-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "neutron-l3-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "neutron-linuxbridge-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "neutron-macvtap-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "neutron-metadata-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "neutron-metering-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "neutron-openvswitch-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "neutron-plugin-linuxbridge-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "neutron-plugin-ml2",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "neutron-plugin-openvswitch-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "neutron-plugin-sriov-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "neutron-server",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "neutron-sriov-agent",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        },
        {
            "binary_name": "python-neutron",
            "binary_version": "2:12.1.1-0ubuntu8.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50266.json"
Ubuntu:20.04:LTS
neutron

Package

Name
neutron
Purl
pkg:deb/ubuntu/neutron?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2:15.*
2:15.0.0-0ubuntu1
2:16.*
2:16.0.0~b1~git2019121613.3e8abb9a8f-0ubuntu1
2:16.0.0~b2~git2020020712.d5b33ffc77-0ubuntu1
2:16.0.0~b2~git2020020712.d5b33ffc77-0ubuntu3
2:16.0.0~b3~git2020032420.a0e1b5804e-0ubuntu1
2:16.0.0~b3~git2020032420.a0e1b5804e-0ubuntu2
2:16.0.0~b3~git2020032420.a0e1b5804e-0ubuntu3
2:16.0.0~b3~git2020032420.a0e1b5804e-0ubuntu4
2:16.0.0~b3~git2020041013.e74c8f8c88-0ubuntu1
2:16.0.0~b3~git2020041516.5f42488a9a-0ubuntu1
2:16.0.0~b3~git2020041516.5f42488a9a-0ubuntu2
2:16.0.0-0ubuntu0.20.04.1
2:16.0.0-0ubuntu0.20.04.2
2:16.1.0-0ubuntu1
2:16.1.0-0ubuntu2
2:16.2.0-0ubuntu1
2:16.2.0-0ubuntu2
2:16.2.0-0ubuntu3
2:16.3.0-0ubuntu3
2:16.3.1-0ubuntu1
2:16.3.1-0ubuntu1.1
2:16.3.2-0ubuntu2
2:16.3.2-0ubuntu3
2:16.4.0-0ubuntu2
2:16.4.0-0ubuntu3
2:16.4.1-0ubuntu2
2:16.4.2-0ubuntu1
2:16.4.2-0ubuntu2
2:16.4.2-0ubuntu3
2:16.4.2-0ubuntu4
2:16.4.2-0ubuntu5
2:16.4.2-0ubuntu6
2:16.4.2-0ubuntu6.1
2:16.4.2-0ubuntu6.2
2:16.4.2-0ubuntu6.3
2:16.4.2-0ubuntu6.4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "neutron-common",
            "binary_version": "2:16.4.2-0ubuntu6.4"
        },
        {
            "binary_name": "neutron-dhcp-agent",
            "binary_version": "2:16.4.2-0ubuntu6.4"
        },
        {
            "binary_name": "neutron-l3-agent",
            "binary_version": "2:16.4.2-0ubuntu6.4"
        },
        {
            "binary_name": "neutron-linuxbridge-agent",
            "binary_version": "2:16.4.2-0ubuntu6.4"
        },
        {
            "binary_name": "neutron-macvtap-agent",
            "binary_version": "2:16.4.2-0ubuntu6.4"
        },
        {
            "binary_name": "neutron-metadata-agent",
            "binary_version": "2:16.4.2-0ubuntu6.4"
        },
        {
            "binary_name": "neutron-metering-agent",
            "binary_version": "2:16.4.2-0ubuntu6.4"
        },
        {
            "binary_name": "neutron-openvswitch-agent",
            "binary_version": "2:16.4.2-0ubuntu6.4"
        },
        {
            "binary_name": "neutron-ovn-metadata-agent",
            "binary_version": "2:16.4.2-0ubuntu6.4"
        },
        {
            "binary_name": "neutron-plugin-ml2",
            "binary_version": "2:16.4.2-0ubuntu6.4"
        },
        {
            "binary_name": "neutron-server",
            "binary_version": "2:16.4.2-0ubuntu6.4"
        },
        {
            "binary_name": "neutron-sriov-agent",
            "binary_version": "2:16.4.2-0ubuntu6.4"
        },
        {
            "binary_name": "python3-neutron",
            "binary_version": "2:16.4.2-0ubuntu6.4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50266.json"
Ubuntu:22.04:LTS
neutron

Package

Name
neutron
Purl
pkg:deb/ubuntu/neutron?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2:19.*
2:19.0.0-0ubuntu1
2:19.1.0+git2022030313.b072cbf05f-0ubuntu1
2:20.*
2:20.0.0-0ubuntu1
2:20.0.0-0ubuntu2
2:20.0.0-0ubuntu3
2:20.1.0-0ubuntu2
2:20.2.0-0ubuntu1
2:20.3.0-0ubuntu1
2:20.3.0-0ubuntu1.1
2:20.3.1-0ubuntu1
2:20.4.0-0ubuntu1
2:20.5.0-0ubuntu1
2:20.5.0-0ubuntu2
2:20.5.0-0ubuntu2.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "neutron-common",
            "binary_version": "2:20.5.0-0ubuntu2.1"
        },
        {
            "binary_name": "neutron-dhcp-agent",
            "binary_version": "2:20.5.0-0ubuntu2.1"
        },
        {
            "binary_name": "neutron-l3-agent",
            "binary_version": "2:20.5.0-0ubuntu2.1"
        },
        {
            "binary_name": "neutron-linuxbridge-agent",
            "binary_version": "2:20.5.0-0ubuntu2.1"
        },
        {
            "binary_name": "neutron-macvtap-agent",
            "binary_version": "2:20.5.0-0ubuntu2.1"
        },
        {
            "binary_name": "neutron-metadata-agent",
            "binary_version": "2:20.5.0-0ubuntu2.1"
        },
        {
            "binary_name": "neutron-metering-agent",
            "binary_version": "2:20.5.0-0ubuntu2.1"
        },
        {
            "binary_name": "neutron-openvswitch-agent",
            "binary_version": "2:20.5.0-0ubuntu2.1"
        },
        {
            "binary_name": "neutron-ovn-metadata-agent",
            "binary_version": "2:20.5.0-0ubuntu2.1"
        },
        {
            "binary_name": "neutron-plugin-ml2",
            "binary_version": "2:20.5.0-0ubuntu2.1"
        },
        {
            "binary_name": "neutron-server",
            "binary_version": "2:20.5.0-0ubuntu2.1"
        },
        {
            "binary_name": "neutron-sriov-agent",
            "binary_version": "2:20.5.0-0ubuntu2.1"
        },
        {
            "binary_name": "python3-neutron",
            "binary_version": "2:20.5.0-0ubuntu2.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50266.json"
Ubuntu:24.04:LTS
neutron

Package

Name
neutron
Purl
pkg:deb/ubuntu/neutron?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2:23.*
2:23.0.0-0ubuntu1
2:24.*
2:24.0.0~b1+git2024011914.5ce17647-0ubuntu1
2:24.0.0~rc1-0ubuntu2
2:24.0.0-0ubuntu1
2:24.0.0-0ubuntu2
2:24.1.0-0ubuntu1
2:24.1.0-0ubuntu1.1
2:24.1.0-0ubuntu1.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "neutron-common",
            "binary_version": "2:24.1.0-0ubuntu1.2"
        },
        {
            "binary_name": "neutron-dhcp-agent",
            "binary_version": "2:24.1.0-0ubuntu1.2"
        },
        {
            "binary_name": "neutron-l3-agent",
            "binary_version": "2:24.1.0-0ubuntu1.2"
        },
        {
            "binary_name": "neutron-linuxbridge-agent",
            "binary_version": "2:24.1.0-0ubuntu1.2"
        },
        {
            "binary_name": "neutron-macvtap-agent",
            "binary_version": "2:24.1.0-0ubuntu1.2"
        },
        {
            "binary_name": "neutron-metadata-agent",
            "binary_version": "2:24.1.0-0ubuntu1.2"
        },
        {
            "binary_name": "neutron-metering-agent",
            "binary_version": "2:24.1.0-0ubuntu1.2"
        },
        {
            "binary_name": "neutron-openvswitch-agent",
            "binary_version": "2:24.1.0-0ubuntu1.2"
        },
        {
            "binary_name": "neutron-ovn-metadata-agent",
            "binary_version": "2:24.1.0-0ubuntu1.2"
        },
        {
            "binary_name": "neutron-plugin-ml2",
            "binary_version": "2:24.1.0-0ubuntu1.2"
        },
        {
            "binary_name": "neutron-server",
            "binary_version": "2:24.1.0-0ubuntu1.2"
        },
        {
            "binary_name": "neutron-sriov-agent",
            "binary_version": "2:24.1.0-0ubuntu1.2"
        },
        {
            "binary_name": "python3-neutron",
            "binary_version": "2:24.1.0-0ubuntu1.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50266.json"
Ubuntu:25.10
neutron

Package

Name
neutron
Purl
pkg:deb/ubuntu/neutron?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2:26.*
2:26.0.0-0ubuntu1
2:26.0.1+git2025070714.71962255de-0ubuntu1
2:26.0.1+git2025070714.71962255de-0ubuntu2
2:27.*
2:27.0.0~rc1-0ubuntu1
2:27.0.0-0ubuntu1
2:27.0.0-0ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "neutron-api",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-common",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-dhcp-agent",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-l3-agent",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-macvtap-agent",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-metadata-agent",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-metering-agent",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-openvswitch-agent",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-ovn-agent",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-ovn-maintenance-worker",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-ovn-metadata-agent",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-periodic-workers",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-plugin-ml2",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-rpc-server",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-server",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-sriov-agent",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "python3-neutron",
            "binary_version": "2:27.0.0-0ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50266.json"
Ubuntu:26.04:LTS
neutron

Package

Name
neutron
Purl
pkg:deb/ubuntu/neutron?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2:27.*
2:27.0.0-0ubuntu1
2:28.*
2:28.0.0~b2+git20260121.28.762694d1bd-0ubuntu1
2:28.0.0~rc1-0ubuntu1
2:28.0.0~rc2-0ubuntu1
2:28.0.0-0ubuntu1
2:28.0.0-0ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "neutron-api",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-common",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-dhcp-agent",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-l3-agent",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-macvtap-agent",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-metadata-agent",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-metering-agent",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-openvswitch-agent",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-ovn-agent",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-ovn-maintenance-worker",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-ovn-metadata-agent",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-periodic-workers",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-plugin-ml2",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-rpc-server",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-server",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "neutron-sriov-agent",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        },
        {
            "binary_name": "python3-neutron",
            "binary_version": "2:28.0.0-0ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50266.json"