CVE-2026-58058

MediumCVSS 6.5/10Last modified Oct 25, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Weakness enumeration

CWE-191

Affected software

No affected versions have been published.

Timeline

Published: Jun 28, 2026
Last modified: Oct 25, 2026
NVD status: Analyzed

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