UBUNTU-CVE-2026-100891

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Source
https://ubuntu.com/security/CVE-2026-100891
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100891.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-100891
Upstream
  • CVE-2026-100891
Published
2026-09-29T00:00:00Z
Modified
2026-09-29T23:41:42Z
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 has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this issue is the function opendmarc_policy_query_dmarc in the library libopendmarc/opendmarc_policy.c of the component Internationalized Domain Name Handler. Such manipulation leads to encoding error. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

References

Affected packages

Ubuntu:18.04:LTS
opendmarc

Package

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

Affected ranges

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

Affected versions

1.*
1.3.2-2
1.3.2-3
1.3.2-3ubuntu0.1
1.3.2-3ubuntu0.2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libopendmarc2",
            "binary_version":  "1.3.2-3ubuntu0.2"
        },
        {
            "binary_name":  "opendmarc",
            "binary_version":  "1.3.2-3ubuntu0.2"
        },
        {
            "binary_name":  "rddmarc",
            "binary_version":  "1.3.2-3ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100891.json"
Ubuntu:20.04:LTS
opendmarc

Package

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

Affected ranges

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

Affected versions

1.*
1.3.2-6
1.3.2-7
1.3.2-7ubuntu0.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libopendmarc2",
            "binary_version":  "1.3.2-7ubuntu0.1"
        },
        {
            "binary_name":  "opendmarc",
            "binary_version":  "1.3.2-7ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100891.json"
Ubuntu:22.04:LTS
opendmarc

Package

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

Affected ranges

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

Affected versions

1.*
1.4.0~beta1+dfsg-6
1.4.1.1-1
1.4.1.1-2
1.4.2-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libopendmarc2",
            "binary_version":  "1.4.2-1"
        },
        {
            "binary_name":  "opendmarc",
            "binary_version":  "1.4.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100891.json"
Ubuntu:24.04:LTS
opendmarc

Package

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

Affected ranges

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

Affected versions

1.*
1.4.2-3
1.4.2-4
1.4.2-4.1build1
1.4.2-4.1build2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libopendmarc2t64",
            "binary_version":  "1.4.2-4.1build2"
        },
        {
            "binary_name":  "opendmarc",
            "binary_version":  "1.4.2-4.1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100891.json"
Ubuntu:26.04:LTS
opendmarc

Package

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

Affected ranges

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

Affected versions

1.*
1.4.2-5.1
1.4.2-5.1build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libopendmarc2t64",
            "binary_version":  "1.4.2-5.1build1"
        },
        {
            "binary_name":  "opendmarc",
            "binary_version":  "1.4.2-5.1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100891.json"
Ubuntu:Pro:16.04:LTS
opendmarc

Package

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

Affected ranges

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

Affected versions

1.*
1.3.1+dfsg-2
1.3.1+dfsg-3
1.3.1+dfsg-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libopendmarc2",
            "binary_version":  "1.3.1+dfsg-3ubuntu0.1~esm1"
        },
        {
            "binary_name":  "opendmarc",
            "binary_version":  "1.3.1+dfsg-3ubuntu0.1~esm1"
        },
        {
            "binary_name":  "rddmarc",
            "binary_version":  "1.3.1+dfsg-3ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100891.json"