{
  "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-2026-40930 LIBPNG: Chunk smuggling in push-mode APNG parser via unconsumed chunk body - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-40930.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": "LIBPNG: Chunk smuggling in push-mode APNG parser via unconsumed chunk body",
    "tracking": {
      "current_release_date": "2026-06-23T14:43:39.000Z",
      "generator": {
        "date": "2026-06-24T07:03:47.768Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-40930",
      "initial_release_date": "2026-06-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-06-09T01:01:48.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2026-06-23T14:43:39.000Z",
          "legacy_version": "2",
          "number": "2",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "category": "product_name",
            "name": "azl3 libpng 0:1.6.58-1.azl3",
            "product": {
              "name": "azl3 libpng 0:1.6.58-1.azl3",
              "product_id": "1"
            }
          },
          {
            "category": "product_name",
            "name": "azl3 qtbase 0:6.6.3-4.azl3",
            "product": {
              "name": "azl3 qtbase 0:6.6.3-4.azl3",
              "product_id": "3"
            }
          },
          {
            "category": "product_name",
            "name": "azl3 tensorflow 0:2.16.1-11.azl3",
            "product": {
              "name": "azl3 tensorflow 0:2.16.1-11.azl3",
              "product_id": "2"
            }
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 libpng 0:1.6.58-1.azl3 as a component of Azure Linux 3.0",
          "product_id": "17084-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17084"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 qtbase 0:6.6.3-4.azl3 as a component of Azure Linux 3.0",
          "product_id": "17084-3"
        },
        "product_reference": "3",
        "relates_to_product_reference": "17084"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 tensorflow 0:2.16.1-11.azl3 as a component of Azure Linux 3.0",
          "product_id": "17084-2"
        },
        "product_reference": "2",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-40930",
      "cwe": {
        "id": "CWE-436",
        "name": "Interpretation Conflict"
      },
      "flags": [
        {
          "label": "component_not_present",
          "product_ids": [
            "17084-3",
            "17084-2"
          ]
        },
        {
          "label": "vulnerable_code_not_present",
          "product_ids": [
            "17084-1"
          ]
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "GitHub_M",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "known_not_affected": [
          "17084-1",
          "17084-3",
          "17084-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-40930 LIBPNG: Chunk smuggling in push-mode APNG parser via unconsumed chunk body - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-40930.json"
        }
      ],
      "title": "LIBPNG: Chunk smuggling in push-mode APNG parser via unconsumed chunk body"
    }
  ]
}