UBUNTU-CVE-2026-18739

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Source
https://ubuntu.com/security/CVE-2026-18739
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18739.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-18739
Upstream
  • CVE-2026-18739
Published
2026-08-04T06:16:00Z
Modified
2026-08-06T00:12:19Z
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, a command-line option parsing library. An off-by-one error in the poptStuffArgs function, when repeatedly called by a host application or through deep alias nesting, can lead to corruption of internal program data. This corruption could potentially enable a local attacker to execute arbitrary code if the host application then unsafely processes the altered data.

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-2026-18739.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-2026-18739.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-2026-18739.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-2026-18739.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-2026-18739.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-2026-18739.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-2026-18739.json"