{
  "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-2021-3607 An integer overflow was found in the QEMU implementation of VMWare\u0027s paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a \"PVRDMA_REG_DSRHIGH\" write from the guest due to improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount of memory resulting in a denial of service. The highest threat from this vulnerability is to system availability. - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2021-3607.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": "An integer overflow was found in the QEMU implementation of VMWare\u0027s paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a \"PVRDMA_REG_DSRHIGH\" write from the guest due to improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount of memory resulting in a denial of service. The highest threat from this vulnerability is to system availability.",
    "tracking": {
      "current_release_date": "2022-03-05T00:00:00.000Z",
      "generator": {
        "date": "2025-10-19T23:18:12.201Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2021-3607",
      "initial_release_date": "2022-02-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2022-03-05T00:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "1.0",
                "product": {
                  "name": "CBL Mariner 1.0",
                  "product_id": "16820"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003ccm1 qemu-kvm 4.2.0-38",
                "product": {
                  "name": "\u003ccm1 qemu-kvm 4.2.0-38",
                  "product_id": "1"
                }
              },
              {
                "category": "product_version",
                "name": "cm1 qemu-kvm 4.2.0-38",
                "product": {
                  "name": "cm1 qemu-kvm 4.2.0-38",
                  "product_id": "18756"
                }
              }
            ],
            "category": "product_name",
            "name": "qemu-kvm"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "\u003ccm1 qemu-kvm 4.2.0-38 as a component of CBL Mariner 1.0",
          "product_id": "16820-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "16820"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cm1 qemu-kvm 4.2.0-38 as a component of CBL Mariner 1.0",
          "product_id": "18756-16820"
        },
        "product_reference": "18756",
        "relates_to_product_reference": "16820"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-3607",
      "cwe": {
        "id": "CWE-190",
        "name": "Integer Overflow or Wraparound"
      },
      "notes": [
        {
          "category": "general",
          "text": "redhat",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "18756-16820"
        ],
        "known_affected": [
          "16820-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2021-3607 An integer overflow was found in the QEMU implementation of VMWare\u0027s paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a \"PVRDMA_REG_DSRHIGH\" write from the guest due to improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount of memory resulting in a denial of service. The highest threat from this vulnerability is to system availability. - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2021-3607.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2022-03-05T00:00:00.000Z",
          "details": "4.2.0-38:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "16820-1"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.0,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "environmentalsScore": 0.0,
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "temporalScore": 6.0,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "16820-1"
          ]
        }
      ],
      "title": "An integer overflow was found in the QEMU implementation of VMWare\u0027s paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a \"PVRDMA_REG_DSRHIGH\" write from the guest due to improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount of memory resulting in a denial of service. The highest threat from this vulnerability is to system availability."
    }
  ]
}