CVE-2026-19624
Fixed in a distro release EPSS <1%CVSS 7.8
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).
Products: Fedora, Fedora Extra Packages for Enterprise Linux (EPEL)
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | network-manager-l2tp | 1.20.8-1+deb12u1 |
| Debian 13 | network-manager-l2tp | 1.20.20-2+deb13u1 |
| Debian 14 | network-manager-l2tp | 1.52.6-1 |
| Ubuntu 18.04 LTS | network-manager-l2tp | no fix |
| Ubuntu 20.04 LTS | network-manager-l2tp | no fix |
| Ubuntu 22.04 LTS | network-manager-l2tp | no fix |
| Ubuntu 24.04 LTS | network-manager-l2tp | no fix |
| Ubuntu 26.04 LTS | network-manager-l2tp | no fix |
| Ubuntu 26.10 | network-manager-l2tp | no fix |