Vulnerability-Lookup

GHSA-WXVJ-HC4R-FQ45

Vulnerability from github – Published: 2026-06-28 03:33 – Updated: 2026-06-28 03:33

Details

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

6.5 (Medium)


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

6.9 (Medium)


                  
                    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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-58058"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-191"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-28T02:16:33Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-wxvj-hc4r-fq45",
  "modified": "2026-06-28T03:33:41Z",
  "published": "2026-06-28T03:33:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58058"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nmap/nmap/commit/bb6754e76bb1686315008e1aa1c40202a513fb83"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bikini/exploitarium/tree/main/nmap-ipv6-extlen-wrap-poc"
    },
    {
      "type": "WEB",
      "url": "https://nmap.org/changelog.html"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/nmap-integer-underflow-in-ipv6-extension-header-parsing"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-58058 (GCVE-0-2026-58058)

Vulnerability from cvelistv5 – Published: 2026-06-28 01:32 – Updated: 2026-06-29 14:53

Title

Nmap - Integer Underflow in IPv6 Extension Header Parsing

Summary

Severity

6.5 (Medium)


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

6.9 (Medium)


                        
                          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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-191 - Integer Underflow (Wrap or Wraparound)

Assigner

VulnCheck

References

4 references

URL	Tags
https://github.com/bikini/exploitarium/tree/main/…	exploitthird-party-advisory
https://github.com/nmap/nmap/commit/bb6754e76bb16…	patch
https://nmap.org/changelog.html	release-notes
https://www.vulncheck.com/advisories/nmap-integer…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Nmap	Nmap	Affected: 0 , ≤ 7.99 (custom)

Date Public

2026-06-25 00:00

Credits

Himanshu Anand

Show details on NVD website

JSON

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-58058",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-29T14:49:07.833303Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-29T14:53:48.365Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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    ],
    "cna": {
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              "status": "affected",
              "version": "0",
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            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:nmap:nmap:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "7.99",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
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          "type": "finder",
          "value": "Himanshu Anand"
        }
      ],
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      "descriptions": [
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          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
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            "baseSeverity": "MEDIUM",
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            "subConfidentialityImpact": "NONE",
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            "vectorString": "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",
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        },
        {
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          ],
          "url": "https://github.com/nmap/nmap/commit/bb6754e76bb1686315008e1aa1c40202a513fb83"
        },
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          "name": "Nmap Change Log",
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          ],
          "url": "https://nmap.org/changelog.html"
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          "tags": [
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          "url": "https://www.vulncheck.com/advisories/nmap-integer-underflow-in-ipv6-extension-header-parsing"
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      "title": "Nmap - Integer Underflow in IPv6 Extension Header Parsing",
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    "datePublished": "2026-06-28T01:32:59.336Z",
    "dateReserved": "2026-06-28T00:58:47.763Z",
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    "state": "PUBLISHED"
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-WXVJ-HC4R-FQ45

CVE-2026-58058 (GCVE-0-2026-58058)

Tags

Sightings

Nomenclature