UBUNTU-CVE-2026-100889

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Source
https://ubuntu.com/security/CVE-2026-100889
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100889.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-100889
Upstream
  • CVE-2026-100889
Published
2026-09-28T00:16:00Z
Modified
2026-09-30T21:41:53Z
Severity
  • 7.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
  • 5.5 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A vulnerability was detected in Trusted Domain Project OpenDKIM up to 2.11.0. Affected is the function dkim_qp_decode of the file util.c of the component Decoder. The manipulation results in off-by-one. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

References

Affected packages

Ubuntu:16.04:LTS
opendkim

Package

Name
opendkim
Purl
pkg:deb/ubuntu/opendkim?arch=source&distro=xenial

Affected ranges

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

Affected versions

2.*
2.10.3-3build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libopendkim10",
            "binary_version":  "2.10.3-3build1"
        },
        {
            "binary_name":  "librbl1",
            "binary_version":  "2.10.3-3build1"
        },
        {
            "binary_name":  "libvbr2",
            "binary_version":  "2.10.3-3build1"
        },
        {
            "binary_name":  "opendkim",
            "binary_version":  "2.10.3-3build1"
        },
        {
            "binary_name":  "opendkim-tools",
            "binary_version":  "2.10.3-3build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100889.json"
Ubuntu:18.04:LTS
opendkim

Package

Name
opendkim
Purl
pkg:deb/ubuntu/opendkim?arch=source&distro=bionic

Affected ranges

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

Affected versions

2.*
2.11.0~alpha-10
2.11.0~alpha-11
2.11.0~alpha-11build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libopendkim11",
            "binary_version":  "2.11.0~alpha-11build1"
        },
        {
            "binary_name":  "librbl1",
            "binary_version":  "2.11.0~alpha-11build1"
        },
        {
            "binary_name":  "libvbr2",
            "binary_version":  "2.11.0~alpha-11build1"
        },
        {
            "binary_name":  "opendkim",
            "binary_version":  "2.11.0~alpha-11build1"
        },
        {
            "binary_name":  "opendkim-tools",
            "binary_version":  "2.11.0~alpha-11build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100889.json"
Ubuntu:20.04:LTS
opendkim

Package

Name
opendkim
Purl
pkg:deb/ubuntu/opendkim?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*
2.11.0~alpha-12
2.11.0~alpha-13
2.11.0~alpha-14
2.11.0~beta2-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libopendkim11",
            "binary_version":  "2.11.0~beta2-1"
        },
        {
            "binary_name":  "librbl1",
            "binary_version":  "2.11.0~beta2-1"
        },
        {
            "binary_name":  "libvbr2",
            "binary_version":  "2.11.0~beta2-1"
        },
        {
            "binary_name":  "opendkim",
            "binary_version":  "2.11.0~beta2-1"
        },
        {
            "binary_name":  "opendkim-tools",
            "binary_version":  "2.11.0~beta2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100889.json"
Ubuntu:22.04:LTS
opendkim

Package

Name
opendkim
Purl
pkg:deb/ubuntu/opendkim?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.11.0~beta2-4build1
2.11.0~beta2-5
2.11.0~beta2-6

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libopendkim11",
            "binary_version":  "2.11.0~beta2-6"
        },
        {
            "binary_name":  "librbl1",
            "binary_version":  "2.11.0~beta2-6"
        },
        {
            "binary_name":  "libvbr2",
            "binary_version":  "2.11.0~beta2-6"
        },
        {
            "binary_name":  "miltertest",
            "binary_version":  "2.11.0~beta2-6"
        },
        {
            "binary_name":  "opendkim",
            "binary_version":  "2.11.0~beta2-6"
        },
        {
            "binary_name":  "opendkim-tools",
            "binary_version":  "2.11.0~beta2-6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100889.json"
Ubuntu:24.04:LTS
opendkim

Package

Name
opendkim
Purl
pkg:deb/ubuntu/opendkim?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.11.0~beta2-8
2.11.0~beta2-9
2.11.0~beta2-9build3
2.11.0~beta2-9build4

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libopendkim11",
            "binary_version":  "2.11.0~beta2-9build4"
        },
        {
            "binary_name":  "librbl1",
            "binary_version":  "2.11.0~beta2-9build4"
        },
        {
            "binary_name":  "libvbr2",
            "binary_version":  "2.11.0~beta2-9build4"
        },
        {
            "binary_name":  "miltertest",
            "binary_version":  "2.11.0~beta2-9build4"
        },
        {
            "binary_name":  "opendkim",
            "binary_version":  "2.11.0~beta2-9build4"
        },
        {
            "binary_name":  "opendkim-tools",
            "binary_version":  "2.11.0~beta2-9build4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100889.json"
Ubuntu:26.04:LTS
opendkim

Package

Name
opendkim
Purl
pkg:deb/ubuntu/opendkim?arch=source&distro=resolute

Affected ranges

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

Affected versions

2.*
2.11.0~beta2-9.2
2.11.0~beta2-9.2build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libopendkim11",
            "binary_version":  "2.11.0~beta2-9.2build1"
        },
        {
            "binary_name":  "librbl1",
            "binary_version":  "2.11.0~beta2-9.2build1"
        },
        {
            "binary_name":  "libvbr2",
            "binary_version":  "2.11.0~beta2-9.2build1"
        },
        {
            "binary_name":  "miltertest",
            "binary_version":  "2.11.0~beta2-9.2build1"
        },
        {
            "binary_name":  "opendkim",
            "binary_version":  "2.11.0~beta2-9.2build1"
        },
        {
            "binary_name":  "opendkim-tools",
            "binary_version":  "2.11.0~beta2-9.2build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100889.json"