CVE-2026-58058 - Nmap - Integer Underflow in IPv6 Extension Header Parsing

CVE-2026-58058 - Nmap - Integer Underflow in IPv6 Extension Header Parsing

https://cvefeed.io/rssfeed/latest.atom / Sun, 06/28/2026 - 07:02
CVE ID :CVE-2026-58058
Published : June 28, 2026, 1:32 a.m. | 3 hours, 9 minutes ago
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.
Severity: 6.9 | MEDIUM
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