Vulnerability Description
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).
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp
- https://github.com/nm-l2tp/NetworkManager-l2tp/commit/3704d8c9d5e5f9ed1626a8ce76
- https://github.com/nm-l2tp/NetworkManager-l2tp/commit/95b6b46f48a0c9eabc79272cd3
- https://github.com/nm-l2tp/NetworkManager-l2tp/releases
- https://linnemanlabs.com/posts/nm-l2tp-newline-to-root/
FAQ
What is CVE-2026-19624?
CVE-2026-19624 is a vulnerability with a CVSS score of 7.8 (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 a...
How severe is CVE-2026-19624?
CVE-2026-19624 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-19624?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.