{"id":"CVE-2026-58058","aliases":["AZL-91391","CLSA-2026-1788628939","CLSA-2026-1788629925","DEBIAN-CVE-2026-58058","EUVD-2026-39978","GHSA-wxvj-hc4r-fq45","MGASA-2026-0268","OESA-2026-2955","OESA-2026-2956","OESA-2026-2957","OESA-2026-2958","OESA-2026-3094","SUSE-SU-2026:22739-1","SUSE-SU-2026:22814-1","SUSE-SU-2026:3333-1","SUSE-SU-2026:3340-1","UBUNTU-CVE-2026-58058"],"status":"published","title":"Nmap - Integer Underflow in IPv6 Extension Header Parsing","description":"Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01454,"percentile":0.73797,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-191"],"published":"2026-06-28T01:32:59Z","modified":"2026-11-05T05:40:51Z","exploits":[{"source":"exploitdb","id":"EDB-52647","title":"Nmap  7.99  - Extension Header Integer Underflow","type":"dos","platform":"multiple","date":"2026-08-17","url":"https://www.exploit-db.com/exploits/52647"}],"fixes":[{"ecosystem":"Azure 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source","product":"nmap"}],"references":[{"url":"https://github.com/bikini/exploitarium/tree/main/nmap-ipv6-extlen-wrap-poc","tags":["exploit","third-party-advisory","Broken Link","evidence","web","report"]},{"url":"https://github.com/nmap/nmap/commit/bb6754e76bb1686315008e1aa1c40202a513fb83","tags":["patch","Patch","fix","report"]},{"url":"https://nmap.org/changelog.html","tags":["release-notes","Patch","Release Notes","advisory","report"]},{"url":"https://www.vulncheck.com/advisories/nmap-integer-underflow-in-ipv6-extension-header-parsing","tags":["third-party-advisory","Patch","Third Party Advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58058","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-wxvj-hc4r-fq45"},{"url":"https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1788628939.html","tags":["advisory"]},{"url":"https://errata.tuxcare.com/els_os/almalinux9.2esu/CLSA-2026-1788629925.html","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58058.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-58058","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0268.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=35812","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MIIROUN7QWWO22LUS5B4KPZ4DNYFQYJZ/","tags":["web"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2955","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2956","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2957","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2958","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3094","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-202622739-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1269570","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2026-58058","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-202622814-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20263333-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20263340-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-58058","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-58058","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-58058","title":"Nmap - Integer Underflow in IPv6 Extension Header Parsing","description":"Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.","status":"published","published":"2026-06-28T01:32:59.336Z","modified":"2026-06-29T14:53:48.365Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T13:47:28.691429Z"}],"euvd":[{"id":"EUVD-2026-39978","description":"Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.","status":"published","published":"2026-06-28T01:32:59Z","modified":"2026-06-29T14:53:48Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:20:22.506413Z"}],"ghsa":[{"id":"GHSA-wxvj-hc4r-fq45","title":"Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in...","description":"Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.","status":"published","published":"2026-06-28T03:33:41Z","modified":"2026-06-28T03:33:49Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T15:09:02.633671Z"}],"nvd":[{"id":"CVE-2026-58058","description":"Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.","status":"published","published":"2026-06-28T02:16:33.13Z","modified":"2026-10-25T17:10:00.197Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T14:12:26.508751Z"}],"osv":[{"id":"CVE-2026-58058","title":"Nmap - Integer Underflow in IPv6 Extension Header Parsing","description":"Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.","status":"published","published":"2026-06-28T01:32:59.336Z","modified":"2026-10-28T11:18:10.563224242Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T15:45:12.016252Z"},{"id":"DEBIAN-CVE-2026-58058","description":"Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.","status":"published","published":"2026-06-28T02:16:33.13Z","modified":"2026-10-26T12:00:14.485315914Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-02T15:45:57.590991Z"},{"id":"OESA-2026-2955","title":"nmap security update","description":"Nmap (\u0026amp;quot;Network Mapper\u0026amp;quot;) is a free and open source (license) utility for network discovery and security \\ auditing. It was designed to rapidly scan large networks, but works fine against single hosts.\r\n\r\nSecurity Fix(es):\n\nNmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.(CVE-2026-58058)","status":"published","published":"2026-07-09T11:11:51Z","modified":"2026-08-18T01:21:16.923742568Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:46.823443Z"},{"id":"OESA-2026-2956","title":"nmap security update","description":"Nmap (\u0026amp;quot;Network Mapper\u0026amp;quot;) is a free and open source (license) utility for network discovery and security \\ auditing. It was designed to rapidly scan large networks, but works fine against single hosts.\r\n\r\nSecurity Fix(es):\n\nNmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.(CVE-2026-58058)","status":"published","published":"2026-07-09T11:11:51Z","modified":"2026-08-18T01:21:16.794050439Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:46.823443Z"},{"id":"OESA-2026-2957","title":"nmap security update","description":"Nmap (\u0026amp;quot;Network Mapper\u0026amp;quot;) is a free and open source (license) utility for network discovery and security \\ auditing. It was designed to rapidly scan large networks, but works fine against single hosts.\r\n\r\nSecurity Fix(es):\n\nNmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.(CVE-2026-58058)","status":"published","published":"2026-07-09T11:11:51Z","modified":"2026-08-18T01:21:16.958189947Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:46.823443Z"},{"id":"OESA-2026-2958","title":"nmap security update","description":"Nmap (\u0026amp;quot;Network Mapper\u0026amp;quot;) is a free and open source (license) utility for network discovery and security \\ auditing. It was designed to rapidly scan large networks, but works fine against single hosts.\r\n\r\nSecurity Fix(es):\n\nNmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.(CVE-2026-58058)","status":"published","published":"2026-07-09T11:11:51Z","modified":"2026-08-18T01:21:16.956587542Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:46.823443Z"},{"id":"OESA-2026-3094","title":"nmap security update","description":"Nmap (\u0026amp;quot;Network Mapper\u0026amp;quot;) is a free and open source (license) utility for network discovery and security \\ auditing. It was designed to rapidly scan large networks, but works fine against single hosts.\r\n\r\nSecurity Fix(es):\n\nNmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.(CVE-2026-58058)","status":"published","published":"2026-07-19T11:11:58Z","modified":"2026-08-18T01:21:21.124146336Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:46.823443Z"},{"id":"UBUNTU-CVE-2026-58058","description":"Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.","status":"published","published":"2026-06-28T02:16:00Z","modified":"2026-10-17T12:59:13.366560304Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium"},{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:56:41.911783Z"},{"id":"AZL-91391","title":"CVE-2026-58058 affecting package nmap for versions less than 7.95-4","description":"Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.","status":"published","published":"2026-06-28T02:16:33Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:25.633663Z"},{"id":"CLSA-2026-1788628939","title":"nmap: Fix of CVE-2026-58058","description":"- CVE-2026-58058: keep the IPv6 extension-header walk inside the captured\n  packet, preventing the remaining-length computation from underflowing and\n  causing out-of-bounds reads during raw IPv6 scans","status":"published","published":"2026-09-05T17:22:30Z","modified":"2026-10-26T09:31:34.85637447Z","updated_at":"2026-11-02T15:43:47.591214Z"},{"id":"CLSA-2026-1788629925","title":"nmap: Fix of CVE-2026-58058","description":"- CVE-2026-58058: fix integer underflow in IPv6 extension header parsing leading to out-of-bounds read","status":"published","published":"2026-09-05T17:38:56Z","modified":"2026-10-26T09:30:46.598617306Z","updated_at":"2026-11-02T15:43:47.591214Z"},{"id":"MGASA-2026-0268","title":"Updated nmap packages fix a security vulnerability","description":"The updated packages fix a security vulnerability:\nInteger Underflow in IPv6 Extension Header Parsing. (CVE-2026-58058)\n","status":"published","published":"2026-07-19T06:29:10Z","modified":"2026-07-19T06:30:05.125508895Z","updated_at":"2026-11-02T15:49:43.795591Z"},{"id":"SUSE-SU-2026:22739-1","title":"Security update for nmap","description":"This update for nmap fixes the following issue\n\n- CVE-2026-58058: crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash (bsc#1269570).\n","status":"published","published":"2026-07-15T12:31:23Z","modified":"2026-07-23T18:24:17.419919319Z","updated_at":"2026-11-02T15:54:03.080707Z"},{"id":"SUSE-SU-2026:22814-1","title":"Security update for nmap","description":"This update for nmap fixes the following issue\n\n- CVE-2026-58058: crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash (bsc#1269570).\n","status":"published","published":"2026-07-15T12:13:13Z","modified":"2026-07-28T18:24:06.745223927Z","updated_at":"2026-11-02T15:54:03.080707Z"},{"id":"SUSE-SU-2026:3333-1","title":"Security update for nmap","description":"This update for nmap fixes the following issue\n\n- CVE-2026-58058: crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash (bsc#1269570).\n","status":"published","published":"2026-07-28T09:40:38Z","modified":"2026-07-29T18:24:24.944032244Z","updated_at":"2026-11-02T15:54:04.987808Z"},{"id":"SUSE-SU-2026:3340-1","title":"Security update for nmap","description":"This update for nmap fixes the following issue:\n\n- CVE-2026-58058: crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash\n  (bsc#1269570).\n","status":"published","published":"2026-07-28T10:04:18Z","modified":"2026-07-28T18:45:06.303105082Z","updated_at":"2026-11-02T15:54:04.987808Z"}]}}