CVE-2006-4997: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 4.9% chance of exploitation in the next 30 days.

The clip_mkip function in net/atm/clip.c of the ATM subsystem in Linux kernel allows remote attackers to cause a denial of service (panic) via unknown vectors that cause the ATM subsystem to access the memory of socket buffers after they are freed (freed pointer dereference).

Affected products

• Canonical Ubuntu Linux: version 5.10 only; version 6.06 only; version 6.10 only
• Linux Linux Kernel: before 2.6.18 (fixed in 2.6.18)
• Red Hat Enterprise Linux: version 2.1 only; version 3 only; version 4 only

Published 2006-10-10. Last modified 2026-06-16.