Security advisory

{
  "id": "14f262eb0d02d3ea4878093c5c58450a907b2d824701e90f32e3c1c969ff578b",
  "url": "https://osv.dev/vulnerability/CVE-2020-2926",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-2926",
    "summary": "Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Group Replication GCS). Supported versions that are affected are 8.0.19 and prior. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.0 Base Score 4.4 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H).",
    "evidence": "osv:CVE-2020-2926",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-2926",
      "aliases": [
        "CVE-2020-2926"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mysql/mysql-server",
              "type": "GIT",
              "events": [
                {
                  "introduced": "270fd3411e3d671a73ed9725940a30080f59ce6d"
                },
                {
                  "fixed": "ea7d2e2d16ac03afdd9cb72a972a95981107bf51"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "8.0.0"
                      },
                      {
                        "fixed": "8.0.19"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-2926.json",
            "vanir_signatures": [
              {
                "id": "CVE-2020-2926-7ba491c1",
                "digest": {
                  "length": 623,
                  "function_hash": "268414797295401743171423323680366405200"
                },
                "source": "https://github.com/mysql/mysql-server/commit/ea7d2e2d16ac03afdd9cb72a972a95981107bf51",
                "target": {
                  "file": "storage/innobase/lob/lob0lob.cc",
                  "function": "ref_t::mark_not_partially_updatable"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2020-2926-85335a60",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "178328081134631892205165699778675444929",
                    "297069519883944742228860306989667015308",
                    "271109606063349901820849047573123524993"
                  ]
                },
                "source": "https://github.com/mysql/mysql-server/commit/ea7d2e2d16ac03afdd9cb72a972a95981107bf51",
                "target": {
                  "file": "storage/innobase/lob/lob0lob.cc"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2020-2926-ba81527a",
                "digest": {
                  "length": 3285,
                  "function_hash": "332510893913262879819453630442491115668"
                },
                "source": "https://github.com/mysql/mysql-server/commit/ea7d2e2d16ac03afdd9cb72a972a95981107bf51",
                "target": {
                  "file": "storage/innobase/lob/lob0purge.cc",
                  "function": "purge"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2020-2926-d821719f",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "180778886619526508923404944111269113775",
                    "147316919537316689965784322676330417174",
                    "5239905161954509642413945198745085468",
                    "17024492428593150706336629452115852309",
                    "104965365280811678162014628868762321369",
                    "282655202815067031575135368237605253571",
                    "200985396871617803559027719623855045437"
                  ]
                },
                "source": "https://github.com/mysql/mysql-server/commit/ea7d2e2d16ac03afdd9cb72a972a95981107bf51",
                "target": {
                  "file": "storage/innobase/lob/lob0purge.cc"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2020-2926-e9f11d86",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "283235786766717374315559903386315292221",
                    "192355070266660537871885306096569471401",
                    "43630985206282853845868250559889278152",
                    "172939939025117458516457434116810536184"
                  ]
                },
                "source": "https://github.com/mysql/mysql-server/commit/ea7d2e2d16ac03afdd9cb72a972a95981107bf51",
                "target": {
                  "file": "storage/innobase/include/lob0lob.h"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-24T14:12:04Z"
          }
        }
      ],
      "modified": "2026-10-24T14:12:04.917053944Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/77REFDB7DE4WNKQIRGZTF53RFBQOXQLC/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SDGBQYS3A36S4CAZPV5YROHYXYZR6LAH/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TSVLI36TYRTPQGCS24VZQUXCUFOUW4VQ/",
        "https://security.gentoo.org/glsa/202105-27",
        "https://security.netapp.com/advisory/ntap-20200416-0003/",
        "https://usn.ubuntu.com/4350-1/",
        "https://www.oracle.com/security-alerts/cpuapr2020.html"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "30"
                  },
                  {
                    "last_affected": "30"
                  },
                  {
                    "introduced": "31"
                  },
                  {
                    "last_affected": "31"
                  },
                  {
                    "introduced": "32"
                  },
                  {
                    "last_affected": "32"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-2926",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 443311,
  "published_at": "2020-04-15T14:15:35.937+00:00"
}