CVE-2022-4129: Fedoraproject Fedora

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

A flaw was found in the Linux kernel's Layer 2 Tunneling Protocol (L2TP). A missing lock when clearing sk_user_data can lead to a race condition and NULL pointer dereference. A local user could use this flaw to potentially crash the system causing a denial of service.

Affected products

• Fedoraproject Fedora: version 35 only; version 36 only; version 37 only
• Linux Layer 2 Tunneling Protocol: before 6.0 (fixed in 6.0)

Published 2022-11-28. Last modified 2026-06-17.