UBUNTU-CVE-2025-40779

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Source
https://ubuntu.com/security/CVE-2025-40779
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-40779.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-40779
Upstream
Withdrawn
2025-11-28T05:19:59Z
Published
2025-08-27T21:15:00Z
Modified
2025-11-28T08:30:57.318322Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

If a DHCPv4 client sends a request with some specific options, and Kea fails to find an appropriate subnet for the client, the kea-dhcp4 process will abort with an assertion failure. This happens only if the client request is unicast directly to Kea; broadcast messages do not cause the problem. This issue affects Kea versions 2.7.1 through 2.7.9, 3.0.0, and 3.1.0.

References

Affected packages

Ubuntu:20.04:LTS
isc-kea

Package

Name
isc-kea
Purl
pkg:deb/ubuntu/isc-kea@1.6.2-0ubuntu1?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*
1.5.0-2ubuntu1
1.5.0-2ubuntu2
1.5.0-2ubuntu3
1.6.1-0ubuntu1
1.6.1-0ubuntu2
1.6.2-0ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kea-admin",
            "binary_version": "1.6.2-0ubuntu1"
        },
        {
            "binary_name": "kea-common",
            "binary_version": "1.6.2-0ubuntu1"
        },
        {
            "binary_name": "kea-ctrl-agent",
            "binary_version": "1.6.2-0ubuntu1"
        },
        {
            "binary_name": "kea-dev",
            "binary_version": "1.6.2-0ubuntu1"
        },
        {
            "binary_name": "kea-dhcp-ddns-server",
            "binary_version": "1.6.2-0ubuntu1"
        },
        {
            "binary_name": "kea-dhcp4-server",
            "binary_version": "1.6.2-0ubuntu1"
        },
        {
            "binary_name": "kea-dhcp6-server",
            "binary_version": "1.6.2-0ubuntu1"
        },
        {
            "binary_name": "python3-kea-connector",
            "binary_version": "1.6.2-0ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-40779.json"
Ubuntu:22.04:LTS
isc-kea

Package

Name
isc-kea
Purl
pkg:deb/ubuntu/isc-kea@2.0.2-1ubuntu0.1?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.8.0-0ubuntu1
2.*
2.0.1-2
2.0.2-1
2.0.2-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kea",
            "binary_version": "2.0.2-1ubuntu0.1"
        },
        {
            "binary_name": "kea-admin",
            "binary_version": "2.0.2-1ubuntu0.1"
        },
        {
            "binary_name": "kea-common",
            "binary_version": "2.0.2-1ubuntu0.1"
        },
        {
            "binary_name": "kea-ctrl-agent",
            "binary_version": "2.0.2-1ubuntu0.1"
        },
        {
            "binary_name": "kea-dev",
            "binary_version": "2.0.2-1ubuntu0.1"
        },
        {
            "binary_name": "kea-dhcp-ddns-server",
            "binary_version": "2.0.2-1ubuntu0.1"
        },
        {
            "binary_name": "kea-dhcp4-server",
            "binary_version": "2.0.2-1ubuntu0.1"
        },
        {
            "binary_name": "kea-dhcp6-server",
            "binary_version": "2.0.2-1ubuntu0.1"
        },
        {
            "binary_name": "python3-kea-connector",
            "binary_version": "2.0.2-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-40779.json"
Ubuntu:24.04:LTS
isc-kea

Package

Name
isc-kea
Purl
pkg:deb/ubuntu/isc-kea@2.4.1-3ubuntu0.1?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.2.1-3
2.4.0-1
2.4.1-1
2.4.1-2build1
2.4.1-3build1
2.4.1-3build3
2.4.1-3build3.1
2.4.1-3ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kea",
            "binary_version": "2.4.1-3ubuntu0.1"
        },
        {
            "binary_name": "kea-admin",
            "binary_version": "2.4.1-3ubuntu0.1"
        },
        {
            "binary_name": "kea-common",
            "binary_version": "2.4.1-3ubuntu0.1"
        },
        {
            "binary_name": "kea-ctrl-agent",
            "binary_version": "2.4.1-3ubuntu0.1"
        },
        {
            "binary_name": "kea-dev",
            "binary_version": "2.4.1-3ubuntu0.1"
        },
        {
            "binary_name": "kea-dhcp-ddns-server",
            "binary_version": "2.4.1-3ubuntu0.1"
        },
        {
            "binary_name": "kea-dhcp4-server",
            "binary_version": "2.4.1-3ubuntu0.1"
        },
        {
            "binary_name": "kea-dhcp6-server",
            "binary_version": "2.4.1-3ubuntu0.1"
        },
        {
            "binary_name": "python3-kea-connector",
            "binary_version": "2.4.1-3ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-40779.json"
Ubuntu:25.04
isc-kea

Package

Name
isc-kea
Purl
pkg:deb/ubuntu/isc-kea@2.6.1-1ubuntu0.1?arch=source&distro=plucky

Affected ranges

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

Affected versions

2.*
2.4.1-3build4
2.6.1-1
2.6.1-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kea",
            "binary_version": "2.6.1-1ubuntu0.1"
        },
        {
            "binary_name": "kea-admin",
            "binary_version": "2.6.1-1ubuntu0.1"
        },
        {
            "binary_name": "kea-common",
            "binary_version": "2.6.1-1ubuntu0.1"
        },
        {
            "binary_name": "kea-ctrl-agent",
            "binary_version": "2.6.1-1ubuntu0.1"
        },
        {
            "binary_name": "kea-dev",
            "binary_version": "2.6.1-1ubuntu0.1"
        },
        {
            "binary_name": "kea-dhcp-ddns-server",
            "binary_version": "2.6.1-1ubuntu0.1"
        },
        {
            "binary_name": "kea-dhcp4-server",
            "binary_version": "2.6.1-1ubuntu0.1"
        },
        {
            "binary_name": "kea-dhcp6-server",
            "binary_version": "2.6.1-1ubuntu0.1"
        },
        {
            "binary_name": "python3-kea-connector",
            "binary_version": "2.6.1-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-40779.json"
Ubuntu:25.10
isc-kea

Package

Name
isc-kea
Purl
pkg:deb/ubuntu/isc-kea@2.6.3-2?arch=source&distro=questing

Affected ranges

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

Affected versions

2.*
2.6.1-1
2.6.1-2
2.6.3-1
2.6.3-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kea",
            "binary_version": "2.6.3-2"
        },
        {
            "binary_name": "kea-admin",
            "binary_version": "2.6.3-2"
        },
        {
            "binary_name": "kea-common",
            "binary_version": "2.6.3-2"
        },
        {
            "binary_name": "kea-ctrl-agent",
            "binary_version": "2.6.3-2"
        },
        {
            "binary_name": "kea-dev",
            "binary_version": "2.6.3-2"
        },
        {
            "binary_name": "kea-dhcp-ddns-server",
            "binary_version": "2.6.3-2"
        },
        {
            "binary_name": "kea-dhcp4-server",
            "binary_version": "2.6.3-2"
        },
        {
            "binary_name": "kea-dhcp6-server",
            "binary_version": "2.6.3-2"
        },
        {
            "binary_name": "python3-kea-connector",
            "binary_version": "2.6.3-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-40779.json"
Ubuntu:Pro:16.04:LTS
isc-kea

Package

Name
isc-kea
Purl
pkg:deb/ubuntu/isc-kea@1.0.0-1ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial

Affected ranges

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

Affected versions

1.*
1.0.0-1
1.0.0-1build1
1.0.0-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kea-admin",
            "binary_version": "1.0.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "kea-common",
            "binary_version": "1.0.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "kea-dev",
            "binary_version": "1.0.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "kea-dhcp-ddns-server",
            "binary_version": "1.0.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "kea-dhcp4-server",
            "binary_version": "1.0.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "kea-dhcp6-server",
            "binary_version": "1.0.0-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-40779.json"
Ubuntu:Pro:18.04:LTS
isc-kea

Package

Name
isc-kea
Purl
pkg:deb/ubuntu/isc-kea@1.1.0-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic

Affected ranges

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

Affected versions

1.*
1.1.0-1
1.1.0-1build1
1.1.0-1build2
1.1.0-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "kea-admin",
            "binary_version": "1.1.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "kea-common",
            "binary_version": "1.1.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "kea-dev",
            "binary_version": "1.1.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "kea-dhcp-ddns-server",
            "binary_version": "1.1.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "kea-dhcp4-server",
            "binary_version": "1.1.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "kea-dhcp6-server",
            "binary_version": "1.1.0-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-40779.json"