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CVE-2026-58058

MEDIUM
6.5
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-58058
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-06-28 00:58 UTC
Published
2026-06-28 01:32 UTC
Last updated
2026-06-28 01:32 UTC
Primary CWE
CWE-191
Integer Underflow (Wrap or Wraparound)
Vendor / Product
Nmap / Nmap
Sources
cve.org  ·  NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Affected products (1)
VendorProductPlatformVersions
Nmap Nmap — 0 ≤ 7.99
Weakness (CWE)
CWESourceDescription
CWE-191 cna Integer Underflow (Wrap or Wraparound)
CVSS scores (2)
ScoreSeverityVersionSourceVector
6.9 MEDIUM 4.0 cna 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
6.5 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
References (4)
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