CVE-2018-9336: Openvpn

High severity, CVSS 7.8. EPSS: 0.6% chance of exploitation in the next 30 days.

openvpnserv.exe (aka the interactive service helper) in OpenVPN 2.4.x before 2.4.6 allows a local attacker to cause a double-free of memory by sending a malformed request to the interactive service. This could cause a denial-of-service through memory corruption or possibly have unspecified other impact including privilege escalation.

Affected products

• Openvpn Openvpn: from 2.4.0, before 2.4.6 (fixed in 2.4.6)
• Slackware Slackware Linux: version 13.0 only; version 13.1 only; version 13.37 only; version 14.0 only; version 14.1 only

Published 2018-05-01. Last modified 2026-06-17.