Security advisory

{
  "id": "26ec476184c46c810c174d1463b65698f35d7742b4bfd907b96997189902f75d",
  "url": "https://osv.dev/vulnerability/CVE-2023-21538",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2023-21538",
    "summary": ".NET Denial of Service Vulnerability",
    "evidence": "osv:CVE-2023-21538",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-21538",
      "aliases": [
        "BIT-dotnet-2023-21538",
        "BIT-dotnet-sdk-2023-21538",
        "BIT-powershell-2023-21538",
        "CVE-2023-21538",
        "GHSA-8f7f-vqg5-jrv9"
      ],
      "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/dotnet/core",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ee849590a02cc5cd61eff18aa64bf985ec45124d"
                },
                {
                  "last_affected": "ee849590a02cc5cd61eff18aa64bf985ec45124d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:microsoft:.net:6.0.0:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "6.0.0-NA"
                      },
                      {
                        "last_affected": "6.0.0-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "6.0.0-NA",
            "v6.0.0",
            "v5.0.12",
            "v3.1.21"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-21538.json"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://github.com/powershell/powershell",
              "type": "GIT",
              "events": [
                {
                  "introduced": "bec5c36d9da67bfcf5b88834f03b326c89f100c5"
                },
                {
                  "last_affected": "bec5c36d9da67bfcf5b88834f03b326c89f100c5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:microsoft:powershell:7.2:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.2"
                      },
                      {
                        "last_affected": "7.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "7.2",
            "v7.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-21538.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:23.533659101Z",
      "provider": "osv",
      "references": [
        "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21538"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "36"
                  },
                  {
                    "last_affected": "36"
                  },
                  {
                    "introduced": "37"
                  },
                  {
                    "last_affected": "37"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:microsoft:powershell:7.2:*:*:*:*:*:*:*"
            ],
            "vendor_product": "microsoft:powershell",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "7.2"
                  },
                  {
                    "last_affected": "7.2"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-21538",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430941,
  "published_at": "2023-01-10T22:15:14.837+00:00"
}