CVE-2008-2136: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 4.9% chance of exploitation in the next 30 days.

Memory leak in the ipip6_rcv function in net/ipv6/sit.c in the Linux kernel 2.4 before 2.4.36.5 and 2.6 before 2.6.25.3 allows remote attackers to cause a denial of service (memory consumption) via network traffic to a Simple Internet Transition (SIT) tunnel interface, related to the pskb_may_pull and kfree_skb functions, and management of an skb reference count.

Affected products

• Canonical Ubuntu Linux: version 6.06 only; version 7.04 only; version 7.10 only; version 8.04 only
• Debian Debian Linux: version 4.0 only
• Linux Linux Kernel: from 2.4.0, before 2.4.36.5 (fixed in 2.4.36.5); from 2.6.0, before 2.6.25.3 (fixed in 2.6.25.3)

Published 2008-05-16. Last modified 2026-06-16.