MSRC_CVE-2025-59375

Vulnerability from csaf_microsoft - Published: 2025-09-02 00:00 - Updated: 2025-09-16 01:01
Summary
libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.

Notes

Additional Resources
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer
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.
To clipboard 

{
  "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-2025-59375 libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing. - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-59375.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": "libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.",
    "tracking": {
      "current_release_date": "2025-09-16T01:01:15.000Z",
      "generator": {
        "date": "2025-10-20T03:48:57.155Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2025-59375",
      "initial_release_date": "2025-09-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2025-09-16T01:01:15.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "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": "\u003ccbl2 expat 2.6.4-2",
                "product": {
                  "name": "\u003ccbl2 expat 2.6.4-2",
                  "product_id": "1"
                }
              },
              {
                "category": "product_version",
                "name": "cbl2 expat 2.6.4-2",
                "product": {
                  "name": "cbl2 expat 2.6.4-2",
                  "product_id": "20543"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003cazl3 expat 2.6.4-1",
                "product": {
                  "name": "\u003cazl3 expat 2.6.4-1",
                  "product_id": "7"
                }
              },
              {
                "category": "product_version",
                "name": "azl3 expat 2.6.4-1",
                "product": {
                  "name": "azl3 expat 2.6.4-1",
                  "product_id": "17470"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003ccbl2 expat 2.6.4-1",
                "product": {
                  "name": "\u003ccbl2 expat 2.6.4-1",
                  "product_id": "3"
                }
              },
              {
                "category": "product_version",
                "name": "cbl2 expat 2.6.4-1",
                "product": {
                  "name": "cbl2 expat 2.6.4-1",
                  "product_id": "20210"
                }
              }
            ],
            "category": "product_name",
            "name": "expat"
          },
          {
            "category": "product_name",
            "name": "cbl2 cmake 3.21.4-18",
            "product": {
              "name": "cbl2 cmake 3.21.4-18",
              "product_id": "4"
            }
          },
          {
            "category": "product_name",
            "name": "azl3 cmake 3.30.3-9",
            "product": {
              "name": "azl3 cmake 3.30.3-9",
              "product_id": "2"
            }
          },
          {
            "category": "product_name",
            "name": "cbl2 python3 3.9.19-14",
            "product": {
              "name": "cbl2 python3 3.9.19-14",
              "product_id": "6"
            }
          },
          {
            "category": "product_name",
            "name": "azl3 python3 3.12.9-4",
            "product": {
              "name": "azl3 python3 3.12.9-4",
              "product_id": "5"
            }
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "\u003ccbl2 expat 2.6.4-2 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 expat 2.6.4-2 as a component of CBL Mariner 2.0",
          "product_id": "20543-17086"
        },
        "product_reference": "20543",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "\u003cazl3 expat 2.6.4-1 as a component of Azure Linux 3.0",
          "product_id": "17084-7"
        },
        "product_reference": "7",
        "relates_to_product_reference": "17084"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 expat 2.6.4-1 as a component of Azure Linux 3.0",
          "product_id": "17470-17084"
        },
        "product_reference": "17470",
        "relates_to_product_reference": "17084"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 cmake 3.21.4-18 as a component of CBL Mariner 2.0",
          "product_id": "17086-4"
        },
        "product_reference": "4",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "\u003ccbl2 expat 2.6.4-1 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": "cbl2 expat 2.6.4-1 as a component of CBL Mariner 2.0",
          "product_id": "20210-17086"
        },
        "product_reference": "20210",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 cmake 3.30.3-9 as a component of Azure Linux 3.0",
          "product_id": "17084-2"
        },
        "product_reference": "2",
        "relates_to_product_reference": "17084"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 python3 3.9.19-14 as a component of CBL Mariner 2.0",
          "product_id": "17086-6"
        },
        "product_reference": "6",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 python3 3.12.9-4 as a component of Azure Linux 3.0",
          "product_id": "17084-5"
        },
        "product_reference": "5",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-59375",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "flags": [
        {
          "label": "vulnerable_code_not_in_execute_path",
          "product_ids": [
            "17086-4",
            "17084-2",
            "17086-6",
            "17084-5"
          ]
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "mitre",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "20543-17086",
          "17470-17084",
          "20210-17086"
        ],
        "known_affected": [
          "17086-1",
          "17084-7",
          "17086-3"
        ],
        "known_not_affected": [
          "17086-4",
          "17084-2",
          "17086-6",
          "17084-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-59375 libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing. - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-59375.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2025-09-16T01:01:15.000Z",
          "details": "2.6.4-2:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "17086-1",
            "17084-7",
            "17086-3"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "remediationLevel": "TEMPORARY_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 7.2,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:H/RL:T/RC:C",
            "version": "3.1"
          },
          "products": [
            "17086-1",
            "17084-7",
            "17086-3"
          ]
        }
      ],
      "title": "libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing."
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.