CVE-2026-12996: Debian Linux

High severity, CVSS 8.1. EPSS: 0.8% chance of exploitation in the next 30 days.

A use-after-free in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry

Affected products

• Debian Debian Linux: version 11.0 only
• Openvpn Openvpn: from 2.6.0, before 2.6.21 (fixed in 2.6.21); from 2.7, before 2.7.5 (fixed in 2.7.5)

Published 2026-07-30. Last modified 2026-08-05.