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CVE-2026-19624 Details

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).

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp	[email protected]
https://github.com/nm-l2tp/NetworkManager-l2tp/commit/3704d8c9d5e5f9ed1626a8ce7627a04247cea673	[email protected]
https://github.com/nm-l2tp/NetworkManager-l2tp/commit/95b6b46f48a0c9eabc79272cd313f219110ef91c	[email protected]
https://github.com/nm-l2tp/NetworkManager-l2tp/releases	[email protected]
https://linnemanlabs.com/posts/nm-l2tp-newline-to-root/	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-88	Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 14, 2026	New CVE Received	[email protected]
Sep 14, 2026	CVE Modified	CISA-ADP