VULNERABILITY INTELLIGENCE

CVE-2026-58058

CVSS score6.5 MEDIUM
EPSS probability1.45%
CISA KEVNot currently listed
Published2026-06-28
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-191

Primary references