CVE-2005-3858: Memory leak in the ip6_input_finish function in ip6_input.c in Linux kernel 2.6.12 and earlier might allow...

Security readout for executives and security teams

This is an old Linux kernel IPv6 flaw that can waste kernel memory when malformed IPv6 packets are handled incorrectly. A successful attack could degrade or crash affected systems, causing a denial of service. The sources do not show code execution, data theft, or confirmed active exploitation. Exposure is most likely on legacy systems running Linux kernel 2.6.12 or earlier with IPv6 packet handling reachable. Modern maintained kernels are unlikely to be affected, but old appliances, embedded systems, or unpatched distributions need confirmation. Treat this as a legacy exposure cleanup item, not an emergency unless vulnerable kernels are internet-facing or operationally critical. Prioritize confirmation and patching where old Linux systems still handle IPv6 traffic. Mitigation focus: Inventory Linux systems still running kernel 2.6.12 or earlier.; Apply vendor kernel updates referenced by Red Hat, Debian, SUSE, or Ubuntu advisories.; Check vendor guidance before using configuration workarounds..

Prepared

Jun 29, 2026, 16:32 UTC (UTC+00:00)

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