Security advisory

{
  "id": "3a4621f1756dd024092cbf4b64aab7c14a2a8b769a159850140d3ff93305e2ea",
  "url": "https://osv.dev/vulnerability/CVE-2020-28975",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-28975",
    "summary": "svm_predict_values in svm.cpp in Libsvm v324, as used in scikit-learn 0.23.2 and other products, allows attackers to cause a denial of service (segmentation fault) via a crafted model SVM (introduced via pickle, json, or any other model permanence standard) with a large value in the _n_support array. NOTE: the scikit-learn vendor's position is that the behavior can only occur if the library's API is violated by an application that changes a private attribute.",
    "evidence": "osv:CVE-2020-28975",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-28975",
      "aliases": [
        "CVE-2020-28975",
        "GHSA-jxfp-4rvq-9h9m",
        "PYSEC-2020-108"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/scikit-learn/scikit-learn",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0fb307bf39bbdacd6ed713c00724f8f871d60370"
                },
                {
                  "fixed": "0d378913be6d7e485b792ea36e9268be31ed52d0"
                },
                {
                  "fixed": "1bf13d567d3cd74854aa8343fd25b61dd768bb85"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:scikit-learn:scikit-learn:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.23.2"
                      },
                      {
                        "fixed": "1.0.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "1bf13d567d3cd74854aa8343fd25b61dd768bb85"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-28975.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:12.731115213Z",
      "provider": "osv",
      "references": [
        "https://security.gentoo.org/glsa/202301-03",
        "https://github.com/scikit-learn/scikit-learn/issues/18891",
        "https://github.com/scikit-learn/scikit-learn/commit/1bf13d567d3cd74854aa8343fd25b61dd768bb85",
        "https://github.com/cjlin1/libsvm/blob/9a3a9708926dec87d382c43b203f2ca19c2d56a0/svm.cpp#L2501"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-28975",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384227,
  "published_at": "2020-11-21T21:15:10.68+00:00"
}