{
  "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-2023-52621 bpf: Check rcu_read_lock_trace_held() before calling bpf map helpers - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2023-52621.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": "bpf: Check rcu_read_lock_trace_held() before calling bpf map helpers",
    "tracking": {
      "current_release_date": "2026-02-18T14:55:22.000Z",
      "generator": {
        "date": "2026-04-30T07:23:48.279Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2023-52621",
      "initial_release_date": "2024-03-02T08:00:00.000Z",
      "revision_history": [
        {
          "date": "2025-09-04T00:31:29.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2026-02-18T14:55:22.000Z",
          "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_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "<cbl2 kernel 0:5.15.182.1-1.cbl2",
                "product": {
                  "name": "<cbl2 kernel 0:5.15.182.1-1.cbl2",
                  "product_id": "1"
                }
              },
              {
                "category": "product_version",
                "name": "cbl2 kernel 0:5.15.182.1-1.cbl2",
                "product": {
                  "name": "cbl2 kernel 0:5.15.182.1-1.cbl2",
                  "product_id": "19682"
                }
              },
              {
                "category": "product_version_range",
                "name": "<cbl2 kernel 0:5.15.182.1-1.cbl2",
                "product": {
                  "name": "<cbl2 kernel 0:5.15.182.1-1.cbl2",
                  "product_id": "2"
                }
              },
              {
                "category": "product_version",
                "name": "cbl2 kernel 0:5.15.182.1-1.cbl2",
                "product": {
                  "name": "cbl2 kernel 0:5.15.182.1-1.cbl2",
                  "product_id": "18490"
                }
              }
            ],
            "category": "product_name",
            "name": "kernel"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "<cbl2 kernel 0:5.15.182.1-1.cbl2 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 kernel 0:5.15.182.1-1.cbl2 as a component of CBL Mariner 2.0",
          "product_id": "19682-17086"
        },
        "product_reference": "19682",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "<cbl2 kernel 0:5.15.182.1-1.cbl2 as a component of CBL Mariner 2.0",
          "product_id": "17086-2"
        },
        "product_reference": "2",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 kernel 0:5.15.182.1-1.cbl2 as a component of CBL Mariner 2.0",
          "product_id": "18490-17086"
        },
        "product_reference": "18490",
        "relates_to_product_reference": "17086"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-52621",
      "cwe": {
        "id": "CWE-617",
        "name": "Reachable Assertion"
      },
      "notes": [
        {
          "category": "general",
          "text": "Linux",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "19682-17086",
          "18490-17086"
        ],
        "known_affected": [
          "17086-1",
          "17086-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2023-52621 bpf: Check rcu_read_lock_trace_held() before calling bpf map helpers - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2023-52621.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2025-09-04T00:31:29.000Z",
          "details": "Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "17086-1"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "temporalScore": 7.8,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "17086-1",
            "17086-2"
          ]
        }
      ],
      "title": "bpf: Check rcu_read_lock_trace_held() before calling bpf map helpers"
    }
  ]
}