network-manager-l2tp: A flaw was found in NetworkManager-l2tp
CVE-2026-19624 is fixed in network-manager-l2tp on 1 platform, first by DEBIAN-CVE-2026-19624, released September 17, 2026. It is not reported as exploited. Patch Radar priority: High.
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).
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| network-manager-l2tp · Debian 12.15 (bookworm) | 1.20.8-1+deb12u1 | DEBIAN-CVE-2026-19624 | Sep 17, 2026 |
| network-manager-l2tp · Debian 13.5 (trixie) | 1.20.20-2+deb13u1 | DEBIAN-CVE-2026-19624 | Sep 17, 2026 |
| network-manager-l2tp · Debian 14 | 1.52.6-1 | DEBIAN-CVE-2026-19624 | Sep 17, 2026 |
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