Improperly Controlled Sequential Memory Allocation in Wireshark

{
  "id": "7902af82d35e468474805c36c0c18c9bbcacfebb29593c9fed614b1779bacf05",
  "url": "https://osv.dev/vulnerability/CVE-2026-6535",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Improperly Controlled Sequential Memory Allocation in Wireshark",
    "summary": "Dissection engine zlib decompression crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service",
    "evidence": "osv:CVE-2026-6535",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-6535",
      "aliases": [
        "CVE-2026-6535"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wireshark/wireshark",
              "type": "GIT",
              "events": [
                {
                  "introduced": "009a163470b581c7d3ee66d89c819cef1f9e50fe"
                },
                {
                  "last_affected": "2e231b8d9926750a68f69a0ed5f80af3cacfe9c3"
                },
                {
                  "introduced": "cdfb6721e77c19d43f4787f66e9d5f2525281a22"
                },
                {
                  "last_affected": "93282876538d78a2927108dd71ee0ff370aedb0a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.4.0"
                      },
                      {
                        "last_affected": "4.4.14"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.6.0"
                      },
                      {
                        "last_affected": "4.6.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            },
            {
              "repo": "https://gitlab.com/wireshark/wireshark",
              "type": "GIT",
              "events": [
                {
                  "introduced": "cdfb6721e77c19d43f4787f66e9d5f2525281a22"
                },
                {
                  "fixed": "b40c46f8386770910317bea2e9187b835502d1b4"
                },
                {
                  "introduced": "009a163470b581c7d3ee66d89c819cef1f9e50fe"
                },
                {
                  "fixed": "8b505c070d65e18c1f33823c4f3fe78af6034b6d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "4.6.0"
                      },
                      {
                        "fixed": "4.6.5"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "4.4.0"
                      },
                      {
                        "fixed": "4.4.15"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.4.14",
            "v4.6.4",
            "v4.4.14rc0",
            "v4.6.4rc0",
            "v4.4.13",
            "v4.6.3",
            "v4.4.13rc0",
            "v4.4.12",
            "v4.6.3rc0",
            "v4.6.2",
            "v4.4.12rc0",
            "v4.6.2rc0",
            "v4.4.11",
            "v4.6.1",
            "v4.4.11rc0",
            "v4.6.1rc0",
            "v4.4.10",
            "v4.6.0",
            "v4.4.10rc0",
            "wireshark-4.4.9",
            "v4.4.9",
            "v4.4.9rc0",
            "wireshark-4.4.8",
            "v4.4.8",
            "v4.4.8rc0",
            "wireshark-4.4.7",
            "v4.4.7",
            "v4.6.7rc0",
            "v4.4.7rc0",
            "wireshark-4.4.6",
            "v4.4.6",
            "v4.4.6rc0",
            "wireshark-4.4.5",
            "v4.4.5",
            "v4.4.5rc0",
            "wireshark-4.4.4",
            "v4.4.4",
            "v4.4.4rc0",
            "wireshark-4.4.3",
            "v4.4.3",
            "v4.4.3rc0",
            "wireshark-4.4.2",
            "v4.4.2",
            "v4.4.2rc0",
            "wireshark-4.4.1",
            "v4.4.1",
            "v4.4.1rc0",
            "wireshark-4.4.0",
            "v4.4.0",
            "v4.4.15rc0",
            "v4.6.5rc0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-6535.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.457686676Z",
      "provider": "osv",
      "references": [
        "https://www.wireshark.org/security/wnpa-sec-2026-26.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6535.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-6535",
        "https://gitlab.com/wireshark/wireshark/-/issues/21097",
        "https://gitlab.com/wireshark/wireshark/-/issues/21098"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1325"
        ],
        "cna_assigner": "GitLab",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6535.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-6535",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497371,
  "published_at": "2026-04-30T05:36:49.218+00:00"
}