CVE-2007-4567: Linux Kernel

High severity, CVSS 7.8. EPSS: 14.3% chance of exploitation in the next 30 days.

The ipv6_hop_jumbo function in net/ipv6/exthdrs.c in the Linux kernel before 2.6.22 does not properly validate the hop-by-hop IPv6 extended header, which allows remote attackers to cause a denial of service (NULL pointer dereference and kernel panic) via a crafted IPv6 packet.

Affected products

• Linux Linux Kernel: up to and including 2.6.21.7; version 2.2.27 only; version 2.4.36 only; version 2.4.36.1 only; version 2.4.36.2 only; version 2.4.36.3 only; …

Published 2007-12-21. Last modified 2026-06-16.