UBUNTU-CVE-2026-18743

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Source
https://ubuntu.com/security/CVE-2026-18743
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18743.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-18743
Upstream
  • CVE-2026-18743
Published
2026-09-01T02:16:00Z
Modified
2026-09-02T16:12:07Z
Severity
  • 2.5 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in popt. This vulnerability allows an attacker to provide specially crafted configuration content to a host, which, when loaded, can lead to a small memory corruption issue. This occurs because of an error in how the poptConfigFileToString function reallocates memory for buffers. Successful exploitation could result in heap metadata corruption, potentially causing the affected process to become unavailable (denial of service).

References

Affected packages

Ubuntu:14.04:LTS
popt

Package

Name
popt
Purl
pkg:deb/ubuntu/popt?arch=source&distro=trusty

Affected ranges

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

Affected versions

1.*
1.16-7ubuntu3
1.16-8
1.16-8ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.16-8ubuntu1",
            "binary_name": "libpopt0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18743.json"
Ubuntu:16.04:LTS
popt

Package

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

Affected ranges

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

Affected versions

1.*
1.16-10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.16-10",
            "binary_name": "libpopt0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18743.json"
Ubuntu:18.04:LTS
popt

Package

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

Affected ranges

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

Affected versions

1.*
1.16-10
1.16-11

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.16-11",
            "binary_name": "libpopt0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18743.json"
Ubuntu:20.04:LTS
popt

Package

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

Affected ranges

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

Affected versions

1.*
1.16-12
1.16-14

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.16-14",
            "binary_name": "libpopt0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18743.json"
Ubuntu:22.04:LTS
popt

Package

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

Affected ranges

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

Affected versions

1.*
1.18-2build2
1.18-2build3
1.18-3
1.18-3build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.18-3build1",
            "binary_name": "libpopt0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18743.json"
Ubuntu:24.04:LTS
popt

Package

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

Affected ranges

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

Affected versions

1.*
1.19+dfsg-1
1.19+dfsg-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.19+dfsg-1build1",
            "binary_name": "libpopt0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18743.json"
Ubuntu:26.04:LTS
popt

Package

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

Affected ranges

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

Affected versions

1.*
1.19+dfsg-2
1.19+dfsg-2build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.19+dfsg-2build1",
            "binary_name": "libpopt0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18743.json"