{"affected":[{"product":"monitoring-plugins","source":"CNA: GitHub_M","vendor":"monitoring-plugins","versions":[{"status":"affected","version":">= 3.0.0-rc1, < 3.0.1"}]}],"cveId":"CVE-2026-63418","cwes":["CWE-190","CWE-787"],"description":"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":7,"severity":"high","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},{"score":7,"severity":"high","source":"NVD: security-advisories@github.com","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793747871067,"publishedAt":1793729185699,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/monitoring-plugins/monitoring-plugins/security/advisories/GHSA-xvvw-4j77-rp7q"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/monitoring-plugins/monitoring-plugins/commit/c35c12e58d326ffbd6cfb3c9097653f9f3fb2f4a"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/monitoring-plugins/monitoring-plugins/releases/tag/v3.0.1"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/monitoring-plugins/monitoring-plugins/commit/c35c12e58d326ffbd6cfb3c9097653f9f3fb2f4a"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/monitoring-plugins/monitoring-plugins/releases/tag/v3.0.1"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/monitoring-plugins/monitoring-plugins/security/advisories/GHSA-xvvw-4j77-rp7q"}],"remediation":[],"revision":"4c7c3051912ce44ff7a8fcf5d84d41634c3f967300b57fba17c7ffaec3fdaff3","sources":[{"modifiedAt":1793745652744,"name":"CNA: GitHub_M","retrievedAt":1793748336067,"url":"https://www.cve.org/CVERecord?id=CVE-2026-63418"},{"modifiedAt":1793747871067,"name":"NVD","retrievedAt":1793751688651,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63418"}],"ssvc":{"assessedAt":1793745396088,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Monitoring Plugins check_icmp: -H argument count overflow leads in setuid-root binary","updatedAt":1793751688651}