CVE-2001-0851: Caldera Openlinux

Medium severity, CVSS 5.0. EPSS: 3.1% chance of exploitation in the next 30 days.

Linux kernel 2.0, 2.2 and 2.4 with syncookies enabled allows remote attackers to bypass firewall rules by brute force guessing the cookie.

Affected products

• Caldera Openlinux: version 2.3 only
• Caldera Openlinux Edesktop: version 2.4 only
• Caldera Openlinux Eserver: version 2.3.1 only
• Caldera Openlinux Server: version 3.1 only
• Caldera Openlinux Workstation: version 3.1 only
• Linux Linux Kernel: version 2.0 only; version 2.2.0 only; version 2.4.0 only
• Suse Suse Linux: version 6.3 only; version 6.4 only; version 7.0 only; version 7.1 only; version 7.2 only; version 7.3 only

Published 2001-12-06. Last modified 2026-06-16.