CVE-2026-58058Nmap 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…
Updated under an hour ago ()
Does this affect you?
It affects nmap. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- Weakness (CWE)
- CWE-191
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 30, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
nmap nmap nmap:nmap | through 7.99 | NVD |
References
- https://github.com/bikini/exploitarium/tree/main/nmap-ipv6-extlen-wrap-pocbroken-link
- https://github.com/nmap/nmap/commit/bb6754e76bb1686315008e1aa1c40202a513fb83patch
- https://nmap.org/changelog.htmlpatch, release-notes
- https://www.vulncheck.com/advisories/nmap-integer-underflow-in-ipv6-extension-header-parsingpatch, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.