NetworkManager-l2tp Privilege Escalation via pppd Plugin Injection (CVE-2026-93337) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-93337

NetworkManager-l2tp Privilege Escalation via pppd Plugin Injection

Answer in brief

CVE-2026-93337 records a Unknown severity vulnerability in NetworkManager-l2tp Privilege Escalation via pppd Plugin Injection. The current sources do not mark it as known exploited. The current feed maps nm-l2tp/NetworkManager-l2tp (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 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

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 nm-l2tp/NetworkManager-l2tp (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
nm-l2tp/NetworkManager-l2tpgeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for nm-l2tp/NetworkManager-l2tp.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

NetworkManager-l2tp contains an improper input validation vulnerability that allows local users with VPN connection creation permissions to inject arbitrary pppd directives by supplying mru or mtu property values containing trailing non-numeric content after a valid integer. Attackers can exploit the verbatim write of unvalidated strings into the pppd options file via write_config_option() to inject the plugin directive, causing the privileged pppd process to load an attacker-controlled shared object and achieve arbitrary code execution as root.

Quoted source text, attributed separately from HOL analysis.