{"id":"UBUNTU-CVE-2026-63418","details":"Monitoring Plugins is a suite of plugins for monitoring applications. From 3.0.0-rc1 until 3.0.1, check_icmp 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 counter, causing process_arguments() to allocate an undersized hosts array and then write subsequent entries out of bounds before main() calls setuid(getuid()). On installations where check_icmp is setuid root, a local low-privileged attacker can corrupt heap memory while the process still has root privileges; reliable privilege escalation has not been demonstrated. Installations that use cap_net_raw file capabilities instead of setuid are not exposed to the privilege-escalation consequence. This issue is fixed in version 3.0.1.","modified":"2026-11-05T11:46:35.844934363Z","published":"2026-11-03T18:18:00Z","upstream":["CVE-2026-63418"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-63418"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-63418"},{"type":"REPORT","url":"https://github.com/monitoring-plugins/monitoring-plugins/security/advisories/GHSA-xvvw-4j77-rp7q"},{"type":"REPORT","url":"https://github.com/monitoring-plugins/monitoring-plugins/commit/c35c12e58d326ffbd6cfb3c9097653f9f3fb2f4a"},{"type":"REPORT","url":"https://github.com/monitoring-plugins/monitoring-plugins/releases/tag/v3.0.1"}],"affected":[{"package":{"name":"monitoring-plugins","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/monitoring-plugins?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.2-2ubuntu1","2.1.2-2ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"monitoring-plugins","binary_version":"2.1.2-2ubuntu2"},{"binary_name":"monitoring-plugins-basic","binary_version":"2.1.2-2ubuntu2"},{"binary_name":"monitoring-plugins-common","binary_version":"2.1.2-2ubuntu2"},{"binary_name":"monitoring-plugins-standard","binary_version":"2.1.2-2ubuntu2"},{"binary_version":"2.1.2-2ubuntu2","binary_name":"nagios-plugins"},{"binary_name":"nagios-plugins-basic","binary_version":"2.1.2-2ubuntu2"},{"binary_name":"nagios-plugins-common","binary_version":"2.1.2-2ubuntu2"},{"binary_name":"nagios-plugins-extra","binary_version":"2.1.2-2ubuntu2"},{"binary_name":"nagios-plugins-standard","binary_version":"2.1.2-2ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63418.json"}},{"package":{"name":"monitoring-plugins","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/monitoring-plugins?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2-3ubuntu1","2.2-3ubuntu2","2.2-3ubuntu3","2.2-3ubuntu3.18.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.2-3ubuntu3.18.04.1","binary_name":"monitoring-plugins"},{"binary_version":"2.2-3ubuntu3.18.04.1","binary_name":"monitoring-plugins-basic"},{"binary_version":"2.2-3ubuntu3.18.04.1","binary_name":"monitoring-plugins-common"},{"binary_name":"monitoring-plugins-standard","binary_version":"2.2-3ubuntu3.18.04.1"},{"binary_name":"nagios-plugins","binary_version":"2.2-3ubuntu3.18.04.1"},{"binary_name":"nagios-plugins-basic","binary_version":"2.2-3ubuntu3.18.04.1"},{"binary_version":"2.2-3ubuntu3.18.04.1","binary_name":"nagios-plugins-common"},{"binary_version":"2.2-3ubuntu3.18.04.1","binary_name":"nagios-plugins-standard"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63418.json"}},{"package":{"name":"monitoring-plugins","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/monitoring-plugins?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2-6build2","2.2-6ubuntu1","2.2-6ubuntu1.1","2.2-6ubuntu1.2"],"ecosystem_specific":{"binaries":[{"binary_name":"monitoring-plugins","binary_version":"2.2-6ubuntu1.2"},{"binary_name":"monitoring-plugins-basic","binary_version":"2.2-6ubuntu1.2"},{"binary_version":"2.2-6ubuntu1.2","binary_name":"monitoring-plugins-common"},{"binary_name":"monitoring-plugins-standard","binary_version":"2.2-6ubuntu1.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63418.json"}},{"package":{"name":"monitoring-plugins","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/monitoring-plugins?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.1-1ubuntu2","2.3.1-1ubuntu3","2.3.1-1ubuntu4"],"ecosystem_specific":{"binaries":[{"binary_name":"monitoring-plugins","binary_version":"2.3.1-1ubuntu4"},{"binary_name":"monitoring-plugins-basic","binary_version":"2.3.1-1ubuntu4"},{"binary_version":"2.3.1-1ubuntu4","binary_name":"monitoring-plugins-common"},{"binary_version":"2.3.1-1ubuntu4","binary_name":"monitoring-plugins-standard"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63418.json"}},{"package":{"name":"monitoring-plugins","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/monitoring-plugins?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.3-6ubuntu1","2.3.5-1ubuntu1","2.3.5-1ubuntu2","2.3.5-1ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_version":"2.3.5-1ubuntu3","binary_name":"monitoring-plugins"},{"binary_version":"2.3.5-1ubuntu3","binary_name":"monitoring-plugins-basic"},{"binary_version":"2.3.5-1ubuntu3","binary_name":"monitoring-plugins-common"},{"binary_name":"monitoring-plugins-standard","binary_version":"2.3.5-1ubuntu3"}]},"database_specific":{"source":"https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