NetworkManager-l2tp: local privilege escalation via ipsec.conf injection (CVE-2026-19624) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-19624

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

Answer in brief

CVE-2026-19624 records a Unknown severity vulnerability in NetworkManager-l2tp: local privilege escalation via ipsec.conf injection. The current sources do not mark it as known exploited. The current feed maps Fedora/Extra Packages for Enterprise Linux (EPEL) (generic), Fedora/Fedora (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 14, 2026Updated Sep 14, 2026Source checked Sep 14, 2026First seen by HOL Sep 14, 2026Material review Sep 14, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Fedora/Extra Packages for Enterprise Linux (EPEL) (generic), Fedora/Fedora (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Fedora/Extra Packages for Enterprise Linux (EPEL)generic	>=1.20.0 <1.20.24	1.20.24
Fedora/Fedorageneric	>=1.52.0 <1.52.4	1.52.4

Recommended response

Check inventory. Check lockfiles and deployed manifests for Fedora/Extra Packages for Enterprise Linux (EPEL), Fedora/Fedora.
Review the reported fix. Update Fedora/Extra Packages for Enterprise Linux (EPEL) to 1.20.24; Fedora/Fedora to 1.52.4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 14, 2026

Sources and claim methodology

Upstream source 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).

Quoted source text, attributed separately from HOL analysis.