CVE-2004-0986: Iptables before 1.2.11, under certain conditions, does not properly load the required modules at system sta...

Security readout for executives and security teams

This flaw can leave a Linux host without its intended iptables firewall after startup. If rules fail to load, services meant to be hidden or filtered may become reachable to remote attackers. The sources identify iptables before 1.2.11 and multiple Linux vendor advisories, but provide no CVSS score. Exposure is most likely on legacy Linux systems using iptables versions earlier than 1.2.11, especially where boot-time firewall rules are relied on for access control. Modern systems are unlikely to be affected unless running old packages or unsupported images. Prioritize remediation on internet-facing or sensitive legacy Linux hosts. The business risk is unexpected network exposure after reboot, not confirmed active exploitation. Treat as high where firewall rules are the main compensating control. Mitigation focus: Upgrade iptables to 1.2.11 or a vendor-fixed package.; Apply relevant Linux distribution security updates from vendor advisories.; Confirm firewall modules and rules load successfully after boot..

Prepared

Jun 30, 2026, 02:08 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.