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CVE-2026-19624

CVE-2026-19624 · NetworkManager-l2tp: local privilege escalation via ipsec.conf injection

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 7.8 · High · EPSS 0.1% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • fedora

    Versions
    • ≥ 1.52.0, < 1.52.4: Affected (semver)

    Update to 1.52.4

  • extra packages for enterprise linux (epel)

    Versions
    • ≥ 1.20.0, < 1.20.24: Affected (semver)

    Update to 1.20.24

  • network-manager-l2tp Debian:12

    Versions
    • 1.20.8-1
    Affected ranges
    • ECOSYSTEM: < 1.20.8-1+deb12u1

    Update to 1.20.8-1+deb12u1

  • network-manager-l2tp Debian:13

    Versions
    • 1.20.20-2
    Affected ranges
    • ECOSYSTEM: < 1.20.20-2+deb13u1

    Update to 1.20.20-2+deb13u1

  • network-manager-l2tp Debian:14

    Versions
    • 1.20.20-2
    • 1.52.0-1
    • 1.52.0-2
    • 1.52.2-1
    • 1.52.4-1
    Affected ranges
    • ECOSYSTEM: < 1.52.6-1

    Update to 1.52.6-1

  • network-manager-l2tp Ubuntu:18.04:LTS

    Versions
    • 1.2.8-1
    • 1.2.8-2build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • network-manager-l2tp Ubuntu:20.04:LTS

    Versions
    • 1.2.10-1
    • 1.2.14-1
    • 1.2.16-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • network-manager-l2tp Ubuntu:22.04:LTS

    Versions
    • 1.2.18-1build1
    • 1.20.0-1
    • 1.20.0-1build1
    • 1.20.0-1build2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • network-manager-l2tp Ubuntu:24.04:LTS

    Versions
    • 1.20.8-1
    • 1.20.10-1
    • 1.20.12-1
    • 1.20.12-1build1
    • 1.20.12-1build2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • network-manager-l2tp Ubuntu:26.10

    Versions
    • 1.52.0-2
    • 1.52.2-1
    • 1.52.4-1
    • 1.52.4-1build1
    • 1.52.6-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • network-manager-l2tp Ubuntu:26.04:LTS

    Versions
    • 1.20.20-2
    • 1.52.0-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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