MediumFix available
nmap — security advisory
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.
- Products
- nmap
- Affected versions
- 7.93+dfsg1-1, 7.94+dfsg1-1, 7.94+dfsg1-1~exp1, 7.94+dfsg1-2, 7.94+dfsg1-3, 7.94+dfsg1-3~bpo12+1, 7.94+dfsg1-4, 7.94+git20230807.3be01efb1+dfsg-1, 7.94+git20230807.3be01efb1+dfsg-1~bpo12+1, 7.94+git20230807.3be01efb1+dfsg-2, 7.94+git20230807.3be01efb1+dfsg-3, 7.94+git20230807.3be01efb1+dfsg-4, 7.94+git20230807.3be01efb1+dfsg-4~bpo12+1, 7.95+dfsg-1, 7.95+dfsg-2, 7.95+dfsg-3, 7.98+dfsg-1, 7.98+dfsg-1~bpo13+1, 7.99+dfsg-1, 7.99+dfsg-2, 7.991+dfsg-1
- Fixed versions
- 7.99+dfsg-2
- CVEs
- CVE-2026-58058
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:22 UTC · Revision 2
Source evidence
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.
osv:DEBIAN-CVE-2026-58058
nmap
Fixed versions: Not specified
nmap
Fixed versions: Not specified
nmap
Fixed versions: 7.99+dfsg-2
Complete source record
{
"id": "9d446cd4de3d91e10a0009d3b4f5ccbf4de948e3f84a799e12b3d5148345c0fb",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-58058",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-58058",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2026-58058",
"products": [
{
"name": {
"value": "nmap",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "7.93+dfsg1-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.94+dfsg1-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.94+dfsg1-1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "7.94+dfsg1-2",
"evidence": "/affected/0/versions"
},
{
"value": "7.94+dfsg1-3",
"evidence": "/affected/0/versions"
},
{
"value": "7.94+dfsg1-3~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "7.94+dfsg1-4",
"evidence": "/affected/0/versions"
},
{
"value": "7.94+git20230807.3be01efb1+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.94+git20230807.3be01efb1+dfsg-1~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "7.94+git20230807.3be01efb1+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "7.94+git20230807.3be01efb1+dfsg-3",
"evidence": "/affected/0/versions"
},
{
"value": "7.94+git20230807.3be01efb1+dfsg-4",
"evidence": "/affected/0/versions"
},
{
"value": "7.94+git20230807.3be01efb1+dfsg-4~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "7.95+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.95+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "7.95+dfsg-3",
"evidence": "/affected/0/versions"
},
{
"value": "7.98+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.98+dfsg-1~bpo13+1",
"evidence": "/affected/0/versions"
},
{
"value": "7.99+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "7.99+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "7.991+dfsg-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "nmap",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "7.95+dfsg-3",
"evidence": "/affected/1/versions"
},
{
"value": "7.98+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.98+dfsg-1~bpo13+1",
"evidence": "/affected/1/versions"
},
{
"value": "7.99+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "7.99+dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "7.991+dfsg-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "nmap",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.99+dfsg-2",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "7.95+dfsg-3",
"evidence": "/affected/2/versions"
},
{
"value": "7.98+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "7.98+dfsg-1~bpo13+1",
"evidence": "/affected/2/versions"
},
{
"value": "7.99+dfsg-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-58058",
"aliases": [
"DEBIAN-CVE-2026-58058"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "nmap",
"purl": "pkg:deb/debian/nmap?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"7.93+dfsg1-1",
"7.94+dfsg1-1",
"7.94+dfsg1-1~exp1",
"7.94+dfsg1-2",
"7.94+dfsg1-3",
"7.94+dfsg1-3~bpo12+1",
"7.94+dfsg1-4",
"7.94+git20230807.3be01efb1+dfsg-1",
"7.94+git20230807.3be01efb1+dfsg-1~bpo12+1",
"7.94+git20230807.3be01efb1+dfsg-2",
"7.94+git20230807.3be01efb1+dfsg-3",
"7.94+git20230807.3be01efb1+dfsg-4",
"7.94+git20230807.3be01efb1+dfsg-4~bpo12+1",
"7.95+dfsg-1",
"7.95+dfsg-2",
"7.95+dfsg-3",
"7.98+dfsg-1",
"7.98+dfsg-1~bpo13+1",
"7.99+dfsg-1",
"7.99+dfsg-2",
"7.991+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-58058.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "nmap",
"purl": "pkg:deb/debian/nmap?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"7.95+dfsg-3",
"7.98+dfsg-1",
"7.98+dfsg-1~bpo13+1",
"7.99+dfsg-1",
"7.99+dfsg-2",
"7.991+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-58058.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.99+dfsg-2"
}
]
}
],
"package": {
"name": "nmap",
"purl": "pkg:deb/debian/nmap?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"7.95+dfsg-3",
"7.98+dfsg-1",
"7.98+dfsg-1~bpo13+1",
"7.99+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-58058.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
],
"modified": "2026-10-26T12:00:14.485315914Z",
"provider": "osv",
"upstream": [
"CVE-2026-58058"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-58058"
]
},
"related_cves": [
{
"value": "CVE-2026-58058",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450939,
"published_at": "2026-06-28T02:16:33.13+00:00"
}