CVE-2026-63418 Monitoring Plugins check_icmp: -H argument count overflow leads in setuid-root binary

Monitoring Plugins is a suite of plugins for monitoring applications. From 3.0.0-rc1 until 3.0.1, checkicmp stores the number of hosts supplied through -H or --Host on the command line, or through --extra-opts files containing Host= entries, in an unsigned short. More than 65,535 hosts wrap the...