Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/nm-l2tp/NetworkManager-l2tp/commit/64879ce0ad866f7c9a45babe4d
- https://github.com/nm-l2tp/NetworkManager-l2tp/security/advisories/GHSA-rp84-8h2
- https://www.vulncheck.com/advisories/networkmanager-l2tp-privilege-escalation-vi
FAQ
What is CVE-2026-93337?
CVE-2026-93337 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 pro...
How severe is CVE-2026-93337?
CVE-2026-93337 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-93337?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.