CVE-2026-58058

Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6getdata_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.

Database specific

{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "last_affected": "7.99"
                }
            ]
        },
        {
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "7.99"
                }
            ]
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "fixed": "7.99"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58058.json",
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-191"
    ]
}

References

Affected packages

Git / github.com/nmap/nmap

Affected ranges

Type

GIT

Repo

https://github.com/nmap/nmap

Events

Introduced

Fixed

bb6754e76bb1686315008e1aa1c40202a513fb83

Database specific

{
    "source": "REFERENCES"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58058.json"