UBUNTU-CVE-2026-55707

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Source
https://ubuntu.com/security/CVE-2026-55707
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55707.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-55707
Upstream
Published
2026-08-05T06:16:00Z
Modified
2026-09-02T13:15:03Z
Severity
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

In OpenStack Neutron before 28.0.2, the subnetpool onboarding API does not verify ownership of the target subnets. An authenticated user can onboard subnets from another project's shared network into their own subnetpool, mutating the victim's subnet state and altering L3 routing and address scope behavior for victim routers.

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-2026-55707.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-2026-55707.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-2026-55707.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-2026-55707.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-2026-55707.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-2026-55707.json"