UBUNTU-CVE-2026-10846

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Source
https://ubuntu.com/security/CVE-2026-10846
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10846.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-10846
Upstream
  • CVE-2026-10846
Downstream
Related
Published
2026-06-09T16:00:00Z
Modified
2026-06-22T09:30:11.170854617Z
Severity
  • 8.2 (High) CVSS_V4 - 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 CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - high
Summary
[none]
Details

NLnet Labs ldns 1.2.0 up to and including versions 1.9.0, when used in applications as (stub) resolver over UDP, lacks matching the query destination address and port with the response source address and port. Furthermore not the query ID, neither the question of the query is matched with that of the response. This makes applications, that use ldns for (stub) resolver functionality over UDP, vulnerable for off-path poisoning attacks. The drill tool, which is shipped with ldns, suffers from this vulnerability.

References

Affected packages

Ubuntu:25.10
ldns

Package

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

Affected ranges

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

Affected versions

1.*
1.8.4-2build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "ldnsutils",
            "binary_version": "1.8.4-2build1"
        },
        {
            "binary_name": "libldns3t64",
            "binary_version": "1.8.4-2build1"
        },
        {
            "binary_name": "python3-ldns",
            "binary_version": "1.8.4-2build1"
        }
    ],
    "priority_reason": "CVSSv4.0 high"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10846.json"
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"
        }
    ],
    "priority_reason": "CVSSv4.0 high",
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10846.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"
        }
    ],
    "priority_reason": "CVSSv4.0 high",
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10846.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"
        }
    ],
    "priority_reason": "CVSSv4.0 high",
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10846.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"
        }
    ],
    "priority_reason": "CVSSv4.0 high",
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10846.json"
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 

{
    "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"
        }
    ],
    "priority_reason": "CVSSv4.0 high",
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10846.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"
        }
    ],
    "priority_reason": "CVSSv4.0 high",
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10846.json"