CVE-2003-0244: The route cache implementation in Linux 2.4, and the Netfilter IP conntrack module, allows remote attackers...

Security readout for executives and security teams

CVE-2003-0244 is a remote denial-of-service issue in old Linux 2.4 networking code. Specially crafted traffic with forged source addresses can force excessive CPU work, potentially making affected hosts, routers, or firewalls slow or unavailable. The sources do not indicate data theft or code execution. Exposure is most likely on legacy Linux 2.4 systems, especially internet-facing routers, firewalls, gateways, or servers using Netfilter connection tracking. Modern Linux systems are not identified as affected in the supplied sources. Prioritize only if legacy Linux 2.4 systems remain operational, especially at the network edge. For current supported platforms, urgency is mainly an asset-discovery and legacy-retirement question. Mitigation focus: Inventory systems for Linux 2.4 kernels and old vendor builds.; Check the linked Red Hat, Debian, Mandrake, and other vendor advisories.; Apply the relevant vendor kernel updates where affected systems remain in service..

Prepared

Jun 30, 2026, 11:12 UTC (UTC+00:00)

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