CVE-2005-2533: Openvpn

Low severity, CVSS 2.1. EPSS: 0.7% chance of exploitation in the next 30 days.

OpenVPN before 2.0.1, when running in "dev tap" Ethernet bridging mode, allows remote authenticated clients to cause a denial of service (memory exhaustion) via a flood of packets with a large number of spoofed MAC addresses.

Affected products

• Openvpn Openvpn: version 2.0 only; version 2.0.1_rc1 only; version 2.0.1_rc2 only; version 2.0.1_rc3 only; version 2.0.1_rc4 only; version 2.0.1_rc5 only; …

Published 2005-08-24. Last modified 2026-06-16.