UBUNTU-CVE-2026-12996

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Source
https://ubuntu.com/security/CVE-2026-12996
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12996.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-12996
Upstream
  • CVE-2026-12996
Downstream
Related
Published
2026-07-03T00:00:00Z
Modified
2026-07-14T23:30:23.721380414Z
Severity
  • Ubuntu - medium
Summary
[none]
Details

ackwritebuf use after free

References

Affected packages

Ubuntu:20.04:LTS
openvpn

Package

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

Affected ranges

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

Affected versions

2.*
2.4.7-1ubuntu2
2.4.7-1ubuntu2.20.04.2
2.4.7-1ubuntu2.20.04.3
2.4.7-1ubuntu2.20.04.4
2.4.12-0ubuntu0.20.04.1
2.4.12-0ubuntu0.20.04.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.4.12-0ubuntu0.20.04.2",
            "binary_name": "openvpn"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12996.json"
Ubuntu:22.04:LTS
openvpn

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.5.11-0ubuntu0.22.04.4

Affected versions

2.*
2.5.1-3ubuntu1
2.5.1-3ubuntu2
2.5.1-3ubuntu4
2.5.1-3ubuntu5
2.5.5-1ubuntu1
2.5.5-1ubuntu3
2.5.5-1ubuntu3.1
2.5.9-0ubuntu0.22.04.2
2.5.9-0ubuntu0.22.04.3
2.5.11-0ubuntu0.22.04.1
2.5.11-0ubuntu0.22.04.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.5.11-0ubuntu0.22.04.4",
            "binary_name": "openvpn"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12996.json"
Ubuntu:24.04:LTS
openvpn

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.6.19-0ubuntu0.24.04.3

Affected versions

2.*
2.6.5-0ubuntu1
2.6.7-1ubuntu1
2.6.9-1ubuntu2
2.6.9-1ubuntu3
2.6.9-1ubuntu4
2.6.9-1ubuntu4.1
2.6.12-0ubuntu0.24.04.1
2.6.12-0ubuntu0.24.04.3
2.6.14-0ubuntu0.24.04.1
2.6.14-0ubuntu0.24.04.2
2.6.14-0ubuntu0.24.04.3
2.6.19-0ubuntu0.24.04.1
2.6.19-0ubuntu0.24.04.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.6.19-0ubuntu0.24.04.3",
            "binary_name": "openvpn"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12996.json"
Ubuntu:25.10
openvpn

Package

Name
openvpn
Purl
pkg:deb/ubuntu/openvpn?arch=source&distro=questing

Affected ranges

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

Affected versions

2.*
2.6.13-1ubuntu3
2.6.14-1ubuntu1
2.6.14-2ubuntu1
2.6.14-2ubuntu1.1
2.6.19-0ubuntu0.25.10.1
2.6.19-0ubuntu0.25.10.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.6.19-0ubuntu0.25.10.2",
            "binary_name": "openvpn"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12996.json"
Ubuntu:26.04:LTS
openvpn

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.7.0-1ubuntu1.2

Affected versions

2.*
2.6.14-2ubuntu1
2.6.15-1ubuntu1
2.7.0~rc5-1ubuntu5
2.7.0~rc6-1ubuntu1
2.7.0-1ubuntu1
2.7.0-1ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.7.0-1ubuntu1.2",
            "binary_name": "openvpn"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12996.json"
Ubuntu:Pro:14.04:LTS
openvpn

Package

Name
openvpn
Purl
pkg:deb/ubuntu/openvpn?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

2.*
2.3.2-4ubuntu1
2.3.2-5ubuntu1
2.3.2-7ubuntu1
2.3.2-7ubuntu2
2.3.2-7ubuntu3
2.3.2-7ubuntu3.1
2.3.2-7ubuntu3.2
2.3.2-7ubuntu3.2+esm1
2.3.2-7ubuntu3.2+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.3.2-7ubuntu3.2+esm2",
            "binary_name": "openvpn"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12996.json"
Ubuntu:Pro:16.04:LTS
openvpn

Package

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

Affected ranges

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

Affected versions

2.*
2.3.7-1ubuntu1
2.3.7-2ubuntu1
2.3.8-1ubuntu1
2.3.10-1ubuntu1
2.3.10-1ubuntu2
2.3.10-1ubuntu2.1
2.3.10-1ubuntu2.2
2.3.10-1ubuntu2.2+esm1
2.3.10-1ubuntu2.2+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.3.10-1ubuntu2.2+esm2",
            "binary_name": "openvpn"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12996.json"
Ubuntu:Pro:18.04:LTS
openvpn

Package

Name
openvpn
Purl
pkg:deb/ubuntu/openvpn?arch=source&distro=esm-infra%2Fbionic

Affected ranges

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

Affected versions

2.*
2.4.3-4ubuntu1
2.4.4-1ubuntu1
2.4.4-2ubuntu1
2.4.4-2ubuntu1.1
2.4.4-2ubuntu1.2
2.4.4-2ubuntu1.3
2.4.4-2ubuntu1.5
2.4.4-2ubuntu1.6
2.4.4-2ubuntu1.7
2.4.4-2ubuntu1.7+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.4.4-2ubuntu1.7+esm1",
            "binary_name": "openvpn"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12996.json"