{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-2645 Acceptance of CertificateVerify Message before ClientKeyExchange in TLS 1.2 - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-2645.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Acceptance of CertificateVerify Message before ClientKeyExchange in TLS 1.2",
    "tracking": {
      "current_release_date": "2026-03-31T15:16:05.000Z",
      "generator": {
        "date": "2026-04-01T07:38:22.489Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-2645",
      "initial_release_date": "2026-03-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-03-25T01:04:35.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2026-03-31T15:16:05.000Z",
          "legacy_version": "2",
          "number": "2",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "2.0",
                "product": {
                  "name": "CBL Mariner 2.0",
                  "product_id": "17086"
                }
              },
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "cbl2 mariadb 10.6.25-1",
                "product": {
                  "name": "cbl2 mariadb 10.6.25-1",
                  "product_id": "1"
                }
              },
              {
                "category": "product_version_range",
                "name": "cbl2 mariadb 10.6.24-1",
                "product": {
                  "name": "cbl2 mariadb 10.6.24-1",
                  "product_id": "3"
                }
              },
              {
                "category": "product_version_range",
                "name": "azl3 mariadb 10.11.16-1",
                "product": {
                  "name": "azl3 mariadb 10.11.16-1",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "mariadb"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 mariadb 10.6.25-1 as a component of CBL Mariner 2.0",
          "product_id": "17086-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 mariadb 10.6.24-1 as a component of CBL Mariner 2.0",
          "product_id": "17086-3"
        },
        "product_reference": "3",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 mariadb 10.11.16-1 as a component of Azure Linux 3.0",
          "product_id": "17084-2"
        },
        "product_reference": "2",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-2645",
      "cwe": {
        "id": "CWE-358",
        "name": "Improperly Implemented Security Check for Standard"
      },
      "notes": [
        {
          "category": "general",
          "text": "wolfSSL",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "known_affected": [
          "17086-1",
          "17086-3",
          "17084-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-2645 Acceptance of CertificateVerify Message before ClientKeyExchange in TLS 1.2 - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-2645.json"
        }
      ],
      "remediations": [
        {
          "category": "none_available",
          "date": "2026-03-25T01:04:35.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17086-1"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-03-25T01:04:35.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17086-3"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-03-25T01:04:35.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-2"
          ]
        }
      ],
      "title": "Acceptance of CertificateVerify Message before ClientKeyExchange in TLS 1.2"
    }
  ]
}