msrc_cve-2025-40909
Vulnerability from csaf_microsoft
Published
2025-05-02 00:00
Modified
2025-07-29 00:00
Summary
Perl threads have a working directory race condition where file operations may target unintended paths

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.


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{
  "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-2025-40909 Perl threads have a working directory race condition where file operations may target unintended paths - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-40909.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": "Perl threads have a working directory race condition where file operations may target unintended paths",
    "tracking": {
      "current_release_date": "2025-07-29T00:00:00.000Z",
      "generator": {
        "date": "2025-10-20T03:18:58.601Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2025-40909",
      "initial_release_date": "2025-05-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2025-07-29T00:00:00.000Z",
          "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": "\u003ccm2 perl 5.34.1-491",
                "product": {
                  "name": "\u003ccm2 perl 5.34.1-491",
                  "product_id": "3"
                }
              },
              {
                "category": "product_version",
                "name": "cm2 perl 5.34.1-491",
                "product": {
                  "name": "cm2 perl 5.34.1-491",
                  "product_id": "19554"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003ccbl2 perl 5.34.1-491",
                "product": {
                  "name": "\u003ccbl2 perl 5.34.1-491",
                  "product_id": "2"
                }
              },
              {
                "category": "product_version",
                "name": "cbl2 perl 5.34.1-491",
                "product": {
                  "name": "cbl2 perl 5.34.1-491",
                  "product_id": "20310"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003cazl3 perl 5.38.2-509",
                "product": {
                  "name": "\u003cazl3 perl 5.38.2-509",
                  "product_id": "1"
                }
              },
              {
                "category": "product_version",
                "name": "azl3 perl 5.38.2-509",
                "product": {
                  "name": "azl3 perl 5.38.2-509",
                  "product_id": "20313"
                }
              }
            ],
            "category": "product_name",
            "name": "perl"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "\u003ccm2 perl 5.34.1-491 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": {
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        },
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        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
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        },
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        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
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        },
        "product_reference": "20310",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
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        },
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        "relates_to_product_reference": "17084"
      },
      {
        "category": "default_component_of",
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          "product_id": "20313-17084"
        },
        "product_reference": "20313",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-40909",
      "cwe": {
        "id": "CWE-362",
        "name": "Concurrent Execution using Shared Resource with Improper Synchronization (\u0026#39;Race Condition\u0026#39;)"
      },
      "notes": [
        {
          "category": "general",
          "text": "CPANSec",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "19554-17086",
          "20310-17086",
          "20313-17084"
        ],
        "known_affected": [
          "17086-3",
          "17086-2",
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-40909 Perl threads have a working directory race condition where file operations may target unintended paths - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-40909.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2025-07-29T00:00:00.000Z",
          "details": "5.34.1-491:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "17086-3",
            "17086-2"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        },
        {
          "category": "vendor_fix",
          "date": "2025-07-29T00:00:00.000Z",
          "details": "5.38.2-509:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "17084-1"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "environmentalsScore": 0.0,
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 5.9,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          "products": [
            "17086-3",
            "17086-2",
            "17084-1"
          ]
        }
      ],
      "title": "Perl threads have a working directory race condition where file operations may target unintended paths"
    }
  ]
}


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