usn-8449-1
Vulnerability from osv_ubuntu
Published
2026-06-18 13:33
Modified
2026-06-22 07:13
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
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-10846",
"severity": [
{
"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_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "ldns",
"purl": "pkg:deb/ubuntu/ldns@1.6.17-8ubuntu0.1+esm2?arch=source\u0026distro=esm-infra-legacy/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.17-8ubuntu0.1+esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.17-5",
"1.6.17-7",
"1.6.17-8",
"1.6.17-8ubuntu0.1",
"1.6.17-8ubuntu0.1+esm1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-10846",
"severity": [
{
"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_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:18.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "ldns",
"purl": "pkg:deb/ubuntu/ldns@1.7.0-3ubuntu4.1+esm1?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.0-3ubuntu4.1+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.7.0-1ubuntu1",
"1.7.0-3ubuntu1",
"1.7.0-3ubuntu2",
"1.7.0-3ubuntu4",
"1.7.0-3ubuntu4.1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-10846",
"severity": [
{
"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_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "ldns",
"purl": "pkg:deb/ubuntu/ldns@1.7.0-4.1ubuntu1+esm2?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.0-4.1ubuntu1+esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.7.0-3ubuntu8",
"1.7.0-4",
"1.7.0-4ubuntu1",
"1.7.0-4.1ubuntu1",
"1.7.0-4.1ubuntu1+esm1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-10846",
"severity": [
{
"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_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:22.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "ldns",
"purl": "pkg:deb/ubuntu/ldns@1.7.1-2ubuntu4+esm2?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.1-2ubuntu4+esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.7.1-2build1",
"1.7.1-2ubuntu1",
"1.7.1-2ubuntu3",
"1.7.1-2ubuntu4",
"1.7.1-2ubuntu4+esm1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-10846",
"severity": [
{
"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_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:24.04:LTS"
}
},
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "ldns",
"purl": "pkg:deb/ubuntu/ldns@1.8.3-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.3-2ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.8.3-1build1",
"1.8.3-1build2",
"1.8.3-2",
"1.8.3-2build1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-10846",
"severity": [
{
"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_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:26.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:26.04:LTS",
"name": "ldns",
"purl": "pkg:deb/ubuntu/ldns@1.8.4-2ubuntu0.26.04.1~esm1?arch=source\u0026distro=esm-apps/resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.4-2ubuntu0.26.04.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.8.4-2build1",
"1.8.4-2build3"
]
}
],
"aliases": [],
"details": "Pablo Ruiz discovered that ldns did not properly validate DNS\nresponses when used as a stub resolver over UDP. A remote\nattacker could possibly use this issue to inject arbitrary DNS\nresponses.",
"id": "USN-8449-1",
"modified": "2026-06-22T07:13:08Z",
"published": "2026-06-18T13:33:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8449-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-10846"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "ldns vulnerability",
"upstream": [
"UBUNTU-CVE-2026-10846"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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