TI-2026-15937 Aliases CVE-2026-19624 GHSA-4533-c5f5-j3h9

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

LOW 35CWE-88Published 2026-09-14 · Updated 2026-09-14

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-88.

Summary

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).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0013 2nd percentileScored 2026-11-07

Fix Fixed NetworkManager-l2tp: 1.0.16, 1.2.22, 1.8.10 +2Fedora (Fedora): 1.52.4+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	NetworkManager-l2tp	1.0.0 to before 1.0.16; 1.2.0 to before 1.2.22; 1.8.0 to before 1.8.10; 1.20.0 to before 1.20.24; 1.52.0 to before 1.52.4	1.0.16, 1.2.22, 1.8.10, 1.20.24, 1.52.4	Patch available	CNA
Fedora	Fedora	1.52.0 to before 1.52.4	1.52.4	Patch available	CNA
Fedora	Extra Packages for Enterprise Linux (EPEL)	1.20.0 to before 1.20.24	1.20.24	Patch available	CNA

NetworkManager-l2tp Vendor— Affected 1.0.0 to before 1.0.16; 1.2.0 to before 1.2.22; 1.8.0 to before 1.8.10; 1.20.0 to before 1.20.24; 1.52.0 to before 1.52.4 Fixed in 1.0.16, 1.2.22, 1.8.10, 1.20.24, 1.52.4 Patch available CNA
Fedora VendorFedora Affected 1.52.0 to before 1.52.4 Fixed in 1.52.4 Patch available CNA
Extra Packages for Enterprise Linux (EPEL) VendorFedora Affected 1.20.0 to before 1.20.24 Fixed in 1.20.24 Patch available CNA

Remediation

Fix · CNA NetworkManager-l2tp Fixed in 1.0.16, 1.2.22, 1.8.10, 1.20.24, 1.52.4
Fix · CNA Fedora (Fedora) Fixed in 1.52.4
Fix · CNA Extra Packages for Enterprise Linux (EPEL) (Fedora) Fixed in 1.20.24

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-19624
2026-10-03 Alias added: GHSA-4533-c5f5-j3h9

References

Patch 2

Advisory 2

Other 1

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

TI-2018-01029 Command injection in Red Hat dhcp CVSS 3.0HIGH 7.5
TI-2024-01796 Improper input validation in Fedora dnf5daemon-server CVSS 3.1HIGH 8.4
TI-2023-05737 Glibc: heap-based buffer overflow in __vsyslog_internal() CVSS 3.1HIGH 8.4
TI-2023-03845 Heap out of bound read in builtin.c CVSS 3.1HIGH 7.1
TI-2023-04922 Draw while calling getdrawinfo() CVSS 3.1MEDIUM 5.3
TI-2023-03123 Crash due to a null pointer dereference in the dn_nsp_send function CVSS 3.1MEDIUM 6.5

See all 95 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences