CVE-2005-3809: Linux Kernel

High severity, CVSS 7.8. EPSS: 2.1% chance of exploitation in the next 30 days.

The nfattr_to_tcp function in ip_conntrack_proto_tcp.c in ctnetlink in Linux kernel 2.6.14 up to 2.6.14.3 allows attackers to cause a denial of service (kernel oops) via an update message without private protocol information, which triggers a null dereference.

Affected products

• Linux Linux Kernel: version 2.6.14 only; version 2.6.14.1 only; version 2.6.14.2 only; version 2.6.14.3 only

Published 2005-11-25. Last modified 2026-06-16.