CVE-2026-58058: Nmap - Integer Underflow in IPv6 Extension Header Parsing
Vendor fix available · Affected: Nmap · Exploitation: possible (1 to 10%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 73% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Nmap · Nmapup to and including 7.99
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CoverageNo articles yet
No CyberSIXT article names CVE-2026-58058 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.