{"id":"CVE-2026-72712","summary":"Nmap 7.99 Denial of Service via Zero-Length TCP Option Packet","details":"Nmap versions up to and including 7.99 contains a denial of service vulnerability that allows remote attackers to crash the application by sending a crafted packet containing a zero-length TCP option. The malformed packet forces the Packet:parse_options() function in nselib/packet.lua to allocate objects in an infinite loop, causing an out-of-memory condition that results in application crash.","modified":"2026-08-15T11:31:22.060996192Z","published":"2026-08-11T17:35:06.192Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-835"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72712.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72712.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72712"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/nmap-denial-of-service-via-zero-length-tcp-option-packet"},{"type":"REPORT","url":"https://github.com/nmap/nmap/issues/3368"},{"type":"FIX","url":"https://github.com/nmap/nmap/commit/7ef4ee030a0023fe22616387a000032e1a678b6a"},{"type":"PACKAGE","url":"https://github.com/nmap/nmap"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nmap/nmap","events":[{"introduced":"0"},{"fixed":"7ef4ee030a0023fe22616387a000032e1a678b6a"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"7.99"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72712.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}