Security advisory

{
  "id": "14756de420df40fd247defa57797e84c4e26b50fb615f47483080237c4dd4934",
  "url": "https://osv.dev/vulnerability/CVE-2016-2338",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2016-2338",
    "summary": "An exploitable heap overflow vulnerability exists in the Psych::Emitter start_document function of Ruby. In Psych::Emitter start_document function heap buffer \"head\" allocation is made based on tags array length. Specially constructed object passed as element of tags array can increase this array size after mentioned allocation and cause heap overflow.",
    "evidence": "osv:CVE-2016-2338",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2016-2338",
      "aliases": [
        "CVE-2016-2338"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ruby/ruby",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a9721a259665149b1b9ff0beabcf5f8dc0136120"
                },
                {
                  "last_affected": "d40ea2afa6ff5a6e5befcf342fb7b6dc58796b20"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:ruby-lang:ruby:2.2.2:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.2.2"
                      },
                      {
                        "last_affected": "2.2.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:ruby-lang:ruby:2.3.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.3.0"
                      },
                      {
                        "last_affected": "2.3.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.2.2",
            "2.3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-2338.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:37.645383969Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2020/03/msg00032.html",
        "https://security.netapp.com/advisory/ntap-20221228-0005/"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.0"
                  },
                  {
                    "last_affected": "8.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2016-2338",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 434273,
  "published_at": "2022-09-29T03:15:11.47+00:00"
}