UBUNTU-CVE-2026-86344

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Source
https://ubuntu.com/security/CVE-2026-86344
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86344.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-86344
Upstream
  • CVE-2026-86344
Published
2026-10-02T00:00:00Z
Modified
2026-10-02T22:30:29Z
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

A flaw was found in 389-ds-base. An unauthenticated remote attacker can send a complete LDAP operation followed by the first bytes of an incomplete LDAPMessage on the same connection, causing the server to hand that connection to a second worker thread before the first worker's result is flushed. The second worker blocks until nsslapd-ioblocktimeout while holding the connection mutex, preventing delivery of the completed operation's result. Repeating this across a small number of connections proportional to the configured worker-thread pool size exhausts the entire pool under default configuration, denying service to all clients (anonymous and authenticated, plaintext and TLS) for as long as the attacker maintains the connections.

References

Affected packages

Ubuntu:22.04:LTS
389-ds-base

Package

Name
389-ds-base
Purl
pkg:deb/ubuntu/389-ds-base?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.4.4.11-2build1
1.4.4.11-2build2
1.4.4.17-1
2.*
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":  "2.0.15-1ubuntu2"
        },
        {
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86344.json"
Ubuntu:24.04:LTS
389-ds-base

Package

Name
389-ds-base
Purl
pkg:deb/ubuntu/389-ds-base?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
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":  "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86344.json"
Ubuntu:26.04:LTS
389-ds-base

Package

Name
389-ds-base
Purl
pkg:deb/ubuntu/389-ds-base?arch=source&distro=resolute

Affected ranges

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

Affected versions

3.*
3.1.2+dfsg1-1
3.1.2+vendor1-2

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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86344.json"
Ubuntu:Pro:16.04:LTS
389-ds-base

Package

Name
389-ds-base
Purl
pkg:deb/ubuntu/389-ds-base?arch=source&distro=esm-apps%2Fxenial

Affected ranges

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

Affected versions

1.*
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":  "1.3.4.9-1ubuntu0.1~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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86344.json"
Ubuntu:Pro:18.04:LTS
389-ds-base

Package

Name
389-ds-base
Purl
pkg:deb/ubuntu/389-ds-base?arch=source&distro=esm-apps%2Fbionic

Affected ranges

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

Affected versions

1.*
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":  "1.3.7.10-1ubuntu1+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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86344.json"
Ubuntu:Pro:20.04:LTS
389-ds-base

Package

Name
389-ds-base
Purl
pkg:deb/ubuntu/389-ds-base?arch=source&distro=esm-apps%2Ffocal

Affected ranges

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

Affected versions

1.*
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":  "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-86344.json"