UBUNTU-CVE-2026-75883

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Source
https://ubuntu.com/security/CVE-2026-75883
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75883.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-75883
Upstream
Published
2026-09-18T16:17:00Z
Modified
2026-09-24T02:01:43Z
Severity
  • 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

The code in pppd that formats a response to a PEAP Request packet in peap_response() copies an entire TLS record of up to 16384 bytes into the fixed global buffer outpacket_buf without checking the available space and without implementing outgoing PEAP fragmentation. Thus a pppd process connecting to a server which requests PEAP authentication can be induced to corrupt global static data following the outpacket_buf array, most likely causing incorrect behavior or a crash.

References

Affected packages

Ubuntu:18.04:LTS / network-manager-l2tp

Package

Name
network-manager-l2tp
Purl
pkg:deb/ubuntu/network-manager-l2tp?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.2.8-1
1.2.8-2build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "network-manager-l2tp",
            "binary_version": "1.2.8-2build1"
        },
        {
            "binary_name": "network-manager-l2tp-gnome",
            "binary_version": "1.2.8-2build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75883.json"

Ubuntu:20.04:LTS / network-manager-l2tp

Package

Name
network-manager-l2tp
Purl
pkg:deb/ubuntu/network-manager-l2tp?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*
1.2.10-1
1.2.14-1
1.2.16-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "network-manager-l2tp",
            "binary_version": "1.2.16-1"
        },
        {
            "binary_name": "network-manager-l2tp-gnome",
            "binary_version": "1.2.16-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75883.json"

Ubuntu:22.04:LTS / network-manager-l2tp

Package

Name
network-manager-l2tp
Purl
pkg:deb/ubuntu/network-manager-l2tp?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.2.18-1build1
1.20.0-1
1.20.0-1build1
1.20.0-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "network-manager-l2tp",
            "binary_version": "1.20.0-1build2"
        },
        {
            "binary_name": "network-manager-l2tp-gnome",
            "binary_version": "1.20.0-1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75883.json"

Ubuntu:24.04:LTS / network-manager-l2tp

Package

Name
network-manager-l2tp
Purl
pkg:deb/ubuntu/network-manager-l2tp?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.20.8-1
1.20.10-1
1.20.12-1
1.20.12-1build1
1.20.12-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "network-manager-l2tp",
            "binary_version": "1.20.12-1build2"
        },
        {
            "binary_name": "network-manager-l2tp-gnome",
            "binary_version": "1.20.12-1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75883.json"

Ubuntu:26.04:LTS / network-manager-l2tp

Package

Name
network-manager-l2tp
Purl
pkg:deb/ubuntu/network-manager-l2tp?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.20.20-2
1.52.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "network-manager-l2tp",
            "binary_version": "1.52.0-2"
        },
        {
            "binary_name": "network-manager-l2tp-gnome",
            "binary_version": "1.52.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75883.json"