UBUNTU-CVE-2026-14940 (CVE-2026-14940)
Vulnerability from osv_ubuntu – Published: 2026-07-07 15:16 – Updated: 2026-07-10 22:21 – Source website
VLAI
Details
A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When normalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a multivalued nested Relative Distinguished Name (RDN), the server can write past the end of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated remote attacker can trigger this condition by sending an LDAP operation whose DN reaches the DN normalization routine, such as a search with a crafted base DN. This can corrupt heap memory and may cause denial of service.
Severity
5.3 (Medium)
5.3 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "389-ds",
"binary_version": "1.3.4.9-1ubuntu0.1~esm1"
},
{
"binary_name": "389-ds-base",
"binary_version": "1.3.4.9-1ubuntu0.1~esm1"
},
{
"binary_name": "389-ds-base-libs",
"binary_version": "1.3.4.9-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "389-ds-base",
"purl": "pkg:deb/ubuntu/389-ds-base@1.3.4.9-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.3.3.12-1build1",
"1.3.3.13-1",
"1.3.4.5-2",
"1.3.4.8-1",
"1.3.4.8-3",
"1.3.4.8-3ubuntu1",
"1.3.4.8-4",
"1.3.4.9-1",
"1.3.4.9-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "389-ds",
"binary_version": "1.3.7.10-1ubuntu1+esm1"
},
{
"binary_name": "389-ds-base",
"binary_version": "1.3.7.10-1ubuntu1+esm1"
},
{
"binary_name": "389-ds-base-libs",
"binary_version": "1.3.7.10-1ubuntu1+esm1"
},
{
"binary_name": "python3-dirsrvtests",
"binary_version": "1.3.7.10-1ubuntu1+esm1"
},
{
"binary_name": "python3-lib389",
"binary_version": "1.3.7.10-1ubuntu1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "389-ds-base",
"purl": "pkg:deb/ubuntu/389-ds-base@1.3.7.10-1ubuntu1+esm1?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.3.7.5-1",
"1.3.7.5-1build1",
"1.3.7.5-1build2",
"1.3.7.9-1",
"1.3.7.10-1",
"1.3.7.10-1ubuntu1",
"1.3.7.10-1ubuntu1+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "389-ds",
"binary_version": "1.4.3.6-2ubuntu0.1~esm1"
},
{
"binary_name": "389-ds-base",
"binary_version": "1.4.3.6-2ubuntu0.1~esm1"
},
{
"binary_name": "389-ds-base-libs",
"binary_version": "1.4.3.6-2ubuntu0.1~esm1"
},
{
"binary_name": "cockpit-389-ds",
"binary_version": "1.4.3.6-2ubuntu0.1~esm1"
},
{
"binary_name": "python3-lib389",
"binary_version": "1.4.3.6-2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "389-ds-base",
"purl": "pkg:deb/ubuntu/389-ds-base@1.4.3.6-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.4.1.6-4",
"1.4.1.6-4build1",
"1.4.2.4-1",
"1.4.2.4-1build1",
"1.4.3.2-1",
"1.4.3.2-1build1",
"1.4.3.6-2",
"1.4.3.6-2ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "389-ds",
"binary_version": "2.0.15-1ubuntu2"
},
{
"binary_name": "389-ds-base",
"binary_version": "2.0.15-1ubuntu2"
},
{
"binary_name": "389-ds-base-libs",
"binary_version": "2.0.15-1ubuntu2"
},
{
"binary_name": "cockpit-389-ds",
"binary_version": "2.0.15-1ubuntu2"
},
{
"binary_name": "python3-lib389",
"binary_version": "2.0.15-1ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "389-ds-base",
"purl": "pkg:deb/ubuntu/389-ds-base@2.0.15-1ubuntu2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.4.4.11-2build1",
"1.4.4.11-2build2",
"1.4.4.17-1",
"2.0.11-2",
"2.0.14-1",
"2.0.15-1",
"2.0.15-1ubuntu2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "389-ds",
"binary_version": "2.4.5+dfsg1-1"
},
{
"binary_name": "389-ds-base",
"binary_version": "2.4.5+dfsg1-1"
},
{
"binary_name": "389-ds-base-libs",
"binary_version": "2.4.5+dfsg1-1"
},
{
"binary_name": "cockpit-389-ds",
"binary_version": "2.4.5+dfsg1-1"
},
{
"binary_name": "python3-lib389",
"binary_version": "2.4.5+dfsg1-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "389-ds-base",
"purl": "pkg:deb/ubuntu/389-ds-base@2.4.5+dfsg1-1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.3.4+dfsg1-1",
"2.4.4+dfsg1-1ubuntu1",
"2.4.4+dfsg1-1ubuntu4",
"2.4.4+dfsg1-3",
"2.4.5+dfsg1-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "389-ds",
"binary_version": "3.1.2+dfsg1-1"
},
{
"binary_name": "389-ds-base",
"binary_version": "3.1.2+dfsg1-1"
},
{
"binary_name": "389-ds-base-libs",
"binary_version": "3.1.2+dfsg1-1"
},
{
"binary_name": "cockpit-389-ds",
"binary_version": "3.1.2+dfsg1-1"
},
{
"binary_name": "python3-lib389",
"binary_version": "3.1.2+dfsg1-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "389-ds-base",
"purl": "pkg:deb/ubuntu/389-ds-base@3.1.2+dfsg1-1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.2+dfsg1-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "389-ds",
"binary_version": "3.1.2+vendor1-2"
},
{
"binary_name": "389-ds-base",
"binary_version": "3.1.2+vendor1-2"
},
{
"binary_name": "389-ds-base-libs",
"binary_version": "3.1.2+vendor1-2"
},
{
"binary_name": "cockpit-389-ds",
"binary_version": "3.1.2+vendor1-2"
},
{
"binary_name": "python3-lib389",
"binary_version": "3.1.2+vendor1-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "389-ds-base",
"purl": "pkg:deb/ubuntu/389-ds-base@3.1.2+vendor1-2?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.2+dfsg1-1",
"3.1.2+vendor1-2"
]
}
],
"aliases": [],
"details": "A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When normalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a multivalued nested Relative Distinguished Name (RDN), the server can write past the end of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated remote attacker can trigger this condition by sending an LDAP operation whose DN reaches the DN normalization routine, such as a search with a crafted base DN. This can corrupt heap memory and may cause denial of service.",
"id": "UBUNTU-CVE-2026-14940",
"modified": "2026-07-10T22:21:42Z",
"published": "2026-07-07T15:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-14940"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-14940"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2497697"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-14940"
]
}
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Sightings
| Author | Source | Type | Date | Other |
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Nomenclature
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vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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