CVE catalog
CVE-2026-58058
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-
- Severity
- Medium · CVSS 6.9
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.45% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | nmap | sid | 7.991+dfsg-1 | fixed |
| Debian | nmap | forky | 7.99+dfsg-2 | fixed |
| Debian | nmap | trixie | 7.95+dfsg-3 | vulnerable |
| Debian | nmap | bookworm | 7.93+dfsg1-1 | vulnerable |
| Cpe | nmap | Not reported | Not reported | vulnerable |
| Cpe | nmap | Not reported | Not reported | unknown |
| Suse | nmap | linux enterprise server ltss extended security 12 sp5 | 6.46-3.9.1 | fixed |
| Suse | nmap | linux enterprise module for basesystem 15 sp7 | 7.92-150600.9.3.1 | fixed |
| Suse | nmap | linux enterprise module for package hub 15 sp7 | 7.92-150600.9.3.1 | fixed |
| Suse | nmap | linux enterprise server 16.0 | 7.92-160000.3.1 | fixed |
| Suse | nmap | linux enterprise server for sap applications 16.0 | 7.92-160000.3.1 | fixed |
| Suse | nmap | linux micro extras 6.2 | 7.92-160000.3.1 | fixed |
| Cpe | nmap | Not reported | Not reported | unknown |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | nmap | source | sid | 7.99+dfsg-2 | unimportant | Not reported | [1140916] |
| Debian | nmap | source | forky | 7.99+dfsg-2 | unimportant | Not reported | [1140916] |
| Debian | nmap | source | trixie | (unfixed) | unimportant | Not reported | [1140916] |
| Debian | nmap | source | bookworm | (unfixed) | unimportant | Not reported | [1140916] |
| Suse | nmap | rpm | linux enterprise server ltss extended security 12 sp5 | 6.46-3.9.1 | Not reported | SUSE-SU-2026:3333-1 | Not reported |
| Suse | nmap | rpm | linux enterprise module for basesystem 15 sp7 | 7.92-150600.9.3.1 | Not reported | SUSE-SU-2026:3340-1 | Not reported |
| Suse | nmap | rpm | linux enterprise module for package hub 15 sp7 | 7.92-150600.9.3.1 | Not reported | SUSE-SU-2026:3340-1 | Not reported |
| Suse | nmap | rpm | linux enterprise server 16.0 | 7.92-160000.3.1 | Not reported | SUSE-SU-2026:22814-1 | Not reported |
| Suse | nmap | rpm | linux enterprise server for sap applications 16.0 | 7.92-160000.3.1 | Not reported | SUSE-SU-2026:22814-1 | Not reported |
| Suse | nmap | rpm | linux micro extras 6.2 | 7.92-160000.3.1 | Not reported | SUSE-SU-2026:22739-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [ncat]Affected
Source package: [nmap]
Details (4)
7.93+dfsg1-1· amd64 · bookwormAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
7.93+dfsg1-1· arm64 · bookwormAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
7.94+git20230807.3be01efb1+dfsg-4~bpo12+1· amd64 · bookworm-backportsAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
7.94+git20230807.3be01efb1+dfsg-4~bpo12+1· arm64 · bookworm-backportsAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
- [ndiff]Affected
Source package: [nmap]
Details (4)
7.93+dfsg1-1· all · bookwormAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
7.93+dfsg1-1· all · bookwormAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
7.94+git20230807.3be01efb1+dfsg-4~bpo12+1· all · bookworm-backportsAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
7.94+git20230807.3be01efb1+dfsg-4~bpo12+1· all · bookworm-backportsAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
- [nmap]Affected
Details (4)
7.93+dfsg1-1· amd64 · bookwormAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
7.93+dfsg1-1· arm64 · bookwormAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
7.94+git20230807.3be01efb1+dfsg-4~bpo12+1· amd64 · bookworm-backportsAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
7.94+git20230807.3be01efb1+dfsg-4~bpo12+1· arm64 · bookworm-backportsAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
- [nmap-common]Affected
Source package: [nmap]
Details (4)
7.93+dfsg1-1· all · bookwormAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
7.93+dfsg1-1· all · bookwormAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
7.94+git20230807.3be01efb1+dfsg-4~bpo12+1· all · bookworm-backportsAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
7.94+git20230807.3be01efb1+dfsg-4~bpo12+1· all · bookworm-backportsAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
- [zenmap]Affected
Source package: [nmap]
Details (2)
7.94+git20230807.3be01efb1+dfsg-4~bpo12+1· all · bookworm-backportsAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
7.94+git20230807.3be01efb1+dfsg-4~bpo12+1· all · bookworm-backportsAffected
nvd · nmap · debian · bookworm; nvd · nmap · debian · 12
[Debian 13 (Trixie)]
- [ncat]Affected
Source package: [nmap]
Details (4)
7.95+dfsg-3· amd64 · trixieAffected
nvd · nmap · debian · 13
7.95+dfsg-3· arm64 · trixieAffected
nvd · nmap · debian · 13
7.98+dfsg-1~bpo13+1· amd64 · trixie-backportsAffected
nvd · nmap · debian · 13
7.98+dfsg-1~bpo13+1· arm64 · trixie-backportsAffected
nvd · nmap · debian · 13
- [ndiff]Affected
Source package: [nmap]
Details (4)
7.95+dfsg-3· all · trixieAffected
nvd · nmap · debian · 13
7.95+dfsg-3· all · trixieAffected
nvd · nmap · debian · 13
7.98+dfsg-1~bpo13+1· all · trixie-backportsAffected
nvd · nmap · debian · 13
7.98+dfsg-1~bpo13+1· all · trixie-backportsAffected
nvd · nmap · debian · 13
- [nmap]Affected
Details (4)
7.95+dfsg-3· amd64 · trixieAffected
nvd · nmap · debian · 13
7.95+dfsg-3· arm64 · trixieAffected
nvd · nmap · debian · 13
7.98+dfsg-1~bpo13+1· amd64 · trixie-backportsAffected
nvd · nmap · debian · 13
7.98+dfsg-1~bpo13+1· arm64 · trixie-backportsAffected
nvd · nmap · debian · 13
- [nmap-common]Affected
Source package: [nmap]
Details (4)
7.95+dfsg-3· all · trixieAffected
nvd · nmap · debian · 13
7.95+dfsg-3· all · trixieAffected
nvd · nmap · debian · 13
7.98+dfsg-1~bpo13+1· all · trixie-backportsAffected
nvd · nmap · debian · 13
7.98+dfsg-1~bpo13+1· all · trixie-backportsAffected
nvd · nmap · debian · 13
- [zenmap]Affected
Source package: [nmap]
Details (4)
7.95+dfsg-3· all · trixieAffected
nvd · nmap · debian · 13
7.95+dfsg-3· all · trixieAffected
nvd · nmap · debian · 13
7.98+dfsg-1~bpo13+1· all · trixie-backportsAffected
nvd · nmap · debian · 13
7.98+dfsg-1~bpo13+1· all · trixie-backportsAffected
nvd · nmap · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_22814-1.json]
- [https://github.com/bikini/exploitarium/tree/main/nmap-ipv6-extlen-wrap-poc]
- [https://github.com/nmap/nmap/commit/bb6754e76bb1686315008e1aa1c40202a513fb83]
- [https://nmap.org/changelog.html]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-58058]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-58058]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22739-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22814-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3333-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3340-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-58058]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-58058.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2098.json]
- [https://www.vulncheck.com/advisories/nmap-integer-underflow-in-ipv6-extension-header-parsing]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]