USN-8449-1

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Source
https://ubuntu.com/security/notices/USN-8449-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8449-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8449-1
Upstream
Related
Published
2026-06-18T13:33:51Z
Modified
2026-06-22T09:32:19.771598159Z
Summary
ldns vulnerability
Details

Pablo Ruiz discovered that ldns did not properly validate DNS responses when used as a stub resolver over UDP. A remote attacker could possibly use this issue to inject arbitrary DNS responses.

References

Affected packages

Ubuntu:Pro:16.04:LTS
ldns

Package

Name
ldns
Purl
pkg:deb/ubuntu/ldns?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.6.17-8ubuntu0.1+esm2

Affected versions

1.*
1.6.17-5
1.6.17-7
1.6.17-8
1.6.17-8ubuntu0.1
1.6.17-8ubuntu0.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ldnsutils",
            "binary_version": "1.6.17-8ubuntu0.1+esm2"
        },
        {
            "binary_name": "libldns1",
            "binary_version": "1.6.17-8ubuntu0.1+esm2"
        },
        {
            "binary_name": "python-ldns",
            "binary_version": "1.6.17-8ubuntu0.1+esm2"
        }
    ],
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:16.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-10846",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8449-1.json"
Ubuntu:Pro:18.04:LTS
ldns

Package

Name
ldns
Purl
pkg:deb/ubuntu/ldns?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.7.0-3ubuntu4.1+esm1

Affected versions

1.*
1.7.0-1ubuntu1
1.7.0-3ubuntu1
1.7.0-3ubuntu2
1.7.0-3ubuntu4
1.7.0-3ubuntu4.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ldnsutils",
            "binary_version": "1.7.0-3ubuntu4.1+esm1"
        },
        {
            "binary_name": "libldns2",
            "binary_version": "1.7.0-3ubuntu4.1+esm1"
        },
        {
            "binary_name": "python-ldns",
            "binary_version": "1.7.0-3ubuntu4.1+esm1"
        },
        {
            "binary_name": "python3-ldns",
            "binary_version": "1.7.0-3ubuntu4.1+esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:18.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-10846",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8449-1.json"
Ubuntu:Pro:20.04:LTS
ldns

Package

Name
ldns
Purl
pkg:deb/ubuntu/ldns?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.7.0-4.1ubuntu1+esm2

Affected versions

1.*
1.7.0-3ubuntu8
1.7.0-4
1.7.0-4ubuntu1
1.7.0-4.1ubuntu1
1.7.0-4.1ubuntu1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ldnsutils",
            "binary_version": "1.7.0-4.1ubuntu1+esm2"
        },
        {
            "binary_name": "libldns2",
            "binary_version": "1.7.0-4.1ubuntu1+esm2"
        },
        {
            "binary_name": "python-ldns",
            "binary_version": "1.7.0-4.1ubuntu1+esm2"
        },
        {
            "binary_name": "python3-ldns",
            "binary_version": "1.7.0-4.1ubuntu1+esm2"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-10846",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:20.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8449-1.json"
Ubuntu:Pro:22.04:LTS
ldns

Package

Name
ldns
Purl
pkg:deb/ubuntu/ldns?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.7.1-2ubuntu4+esm2

Affected versions

1.*
1.7.1-2build1
1.7.1-2ubuntu1
1.7.1-2ubuntu3
1.7.1-2ubuntu4
1.7.1-2ubuntu4+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ldnsutils",
            "binary_version": "1.7.1-2ubuntu4+esm2"
        },
        {
            "binary_name": "libldns3",
            "binary_version": "1.7.1-2ubuntu4+esm2"
        },
        {
            "binary_name": "python3-ldns",
            "binary_version": "1.7.1-2ubuntu4+esm2"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8449-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:22.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ],
            "id": "CVE-2026-10846"
        }
    ]
}
Ubuntu:Pro:24.04:LTS
ldns

Package

Name
ldns
Purl
pkg:deb/ubuntu/ldns?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.8.3-2ubuntu0.1~esm1

Affected versions

1.*
1.8.3-1build1
1.8.3-1build2
1.8.3-2
1.8.3-2build1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "ldnsutils",
            "binary_version": "1.8.3-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "libldns3t64",
            "binary_version": "1.8.3-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "python3-ldns",
            "binary_version": "1.8.3-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-10846",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8449-1.json"
Ubuntu:Pro:26.04:LTS
ldns

Package

Name
ldns
Purl
pkg:deb/ubuntu/ldns?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.8.4-2ubuntu0.26.04.1~esm1

Affected versions

1.*
1.8.4-2build1
1.8.4-2build3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ldnsutils",
            "binary_version": "1.8.4-2ubuntu0.26.04.1~esm1"
        },
        {
            "binary_name": "libldns3t64",
            "binary_version": "1.8.4-2ubuntu0.26.04.1~esm1"
        },
        {
            "binary_name": "python3-ldns",
            "binary_version": "1.8.4-2ubuntu0.26.04.1~esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-10846",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "high"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8449-1.json"