CVE-2015-6496: conntrackd in conntrack-tools 1.4.2 and earlier does not ensure that the optional kernel modules are loaded...

Security readout for executives and security teams

CVE-2015-6496 is a denial-of-service flaw in conntrackd from conntrack-tools 1.4.2 and earlier. A remote packet using DCCP, SCTP, or ICMPv6 could crash the service when optional kernel modules were not loaded. Business impact is service disruption, particularly where conntrackd supports firewall or connection-tracking high availability. Exposure is limited to systems running conntrackd from conntrack-tools 1.4.2 or earlier, or distribution packages carrying the vulnerable behavior. Systems not running conntrackd are not indicated as affected by the provided sources. Prioritize remediation on firewalls, gateways, and HA systems where conntrackd failure could interrupt traffic handling. Treat as operational resilience work rather than a breach-risk emergency unless local exposure is broad or service availability is critical. Mitigation focus: Inventory systems running conntrackd or conntrack-tools and record package versions.; Apply vendor updates from Debian, Fedora, openSUSE, or other supported distribution channels.; Move off conntrack-tools 1.4.2 or earlier where affected packages remain deployed..

Prepared

Jun 13, 2026, 22:03 UTC (UTC+00:00)

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