CVE-2026-58058 (GCVE-0-2026-58058)

Vulnerability from cvelistv5 – Published: 2026-06-28 01:32 – Updated: 2026-06-29 14:53
VLAI
Title
Nmap - Integer Underflow in IPv6 Extension Header Parsing
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.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
6.9 (Medium)
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
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-29 14:49 UTC
CWE
  • CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 7131 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Nmap Nmap Affected: 0 , ≤ 7.99 (custom)
    cpe:2.3:a:nmap:nmap:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-06-25 00:00
Credits
Himanshu Anand
Show details on NVD website
To clipboard 

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