CVE-2026-19624

NetworkManager-l2tp: local privilege escalation via ipsec.conf injection

CVSS 3.1 7.8 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-19624

Published

A flaw was found in NetworkManager-l2tp. The plugin writes attacker-controlled VPN connection properties (vpn.data and vpn.secrets values) unescaped into a generated ipsec.conf file that pluto loads as root. A local unprivileged user can create and activate their own L2TP VPN profile containing a newline-injected leftupdown directive; pluto executes that command as root when the IKE security association is established, resulting in local privilege escalation. This is the same bug class as CVE-2018-10900 (NetworkManager-vpnc).

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-19624

Published

NetworkManager-l2tp

https://github.com/nm-l2tp/NetworkManager-l2tp

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "packageName": "NetworkManager-l2tp",
                    "collectionURL": "https://github.com/nm-l2tp/NetworkManager-l2tp",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "1.0.0",
                            "lessThan": "1.0.16",
                            "versionType": "semver",
                            "status": "affected"
                        },
                        {
                            "version": "1.2.0",
                            "lessThan": "1.2.22",
                            "versionType": "semver",
                            "status": "affected"
                        },
                        {
                            "version": "1.8.0",
                            "lessThan": "1.8.10",
                            "versionType": "semver",
                            "status": "affected"
                        },
                        {
                            "version": "1.20.0",
                            "lessThan": "1.20.24",
                            "versionType": "semver",
                            "status": "affected"
                        },
                        {
                            "version": "1.52.0",
                            "lessThan": "1.52.4",
                            "versionType": "semver",
                            "status": "affected"
                        }
                    ]
                }

NetworkManager-l2tp

https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Fedora",
                    "product": "Fedora",
                    "packageName": "NetworkManager-l2tp",
                    "collectionURL": "https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "1.52.0",
                            "lessThan": "1.52.4",
                            "versionType": "semver",
                            "status": "affected"
                        }
                    ]
                }

NetworkManager-l2tp

https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Fedora",
                    "product": "Extra Packages for Enterprise Linux (EPEL)",
                    "packageName": "NetworkManager-l2tp",
                    "collectionURL": "https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "1.20.0",
                            "lessThan": "1.20.24",
                            "versionType": "semver",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON