{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/cloudlinux7els/vex/2026/cve-2026-63384-els_os-cloudlinux7els.json"
      }
    ],
    "tracking": {
      "current_release_date": "2026-10-26T09:22:40Z",
      "generator": {
        "date": "2026-10-26T09:22:40Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2026-63384-ELS_OS-CLOUDLINUX7ELS",
      "initial_release_date": "2026-08-20T18:16:00Z",
      "revision_history": [
        {
          "date": "2026-08-20T18:16:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-10-21T13:12:36Z",
          "number": "2",
          "summary": "Official Publication"
        },
        {
          "date": "2026-10-26T09:22:40Z",
          "number": "3",
          "summary": "Update document"
        }
      ],
      "status": "final",
      "version": "3"
    },
    "title": "Security update on CVE-2026-63384"
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "CloudLinux 7",
                "product": {
                  "name": "CloudLinux 7",
                  "product_id": "CloudLinux-7",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:o:cloudlinux:cloudlinux:7:*:*:*:*:*:*:*"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "CloudLinux"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "libevent-0:2.0.21-4.el7.x86_64",
                "product": {
                  "name": "libevent-0:2.0.21-4.el7.x86_64",
                  "product_id": "libevent-0:2.0.21-4.el7.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent@2.0.21-4.el7?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libevent-devel-0:2.0.21-4.el7.x86_64",
                "product": {
                  "name": "libevent-devel-0:2.0.21-4.el7.x86_64",
                  "product_id": "libevent-devel-0:2.0.21-4.el7.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent-devel@2.0.21-4.el7?arch=x86_64"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "libevent-0:2.0.21-4.el7.i686",
                "product": {
                  "name": "libevent-0:2.0.21-4.el7.i686",
                  "product_id": "libevent-0:2.0.21-4.el7.i686",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent@2.0.21-4.el7?arch=i686"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libevent-devel-0:2.0.21-4.el7.i686",
                "product": {
                  "name": "libevent-devel-0:2.0.21-4.el7.i686",
                  "product_id": "libevent-devel-0:2.0.21-4.el7.i686",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent-devel@2.0.21-4.el7?arch=i686"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "i686"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "libevent-doc-0:2.0.21-4.el7.noarch",
                "product": {
                  "name": "libevent-doc-0:2.0.21-4.el7.noarch",
                  "product_id": "libevent-doc-0:2.0.21-4.el7.noarch",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent-doc@2.0.21-4.el7?arch=noarch"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "noarch"
          }
        ],
        "category": "vendor",
        "name": "Cloud Linux Software, Inc."
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "libevent-0:2.0.21-4.el7.tuxcare.els1.x86_64",
                "product": {
                  "name": "libevent-0:2.0.21-4.el7.tuxcare.els1.x86_64",
                  "product_id": "libevent-0:2.0.21-4.el7.tuxcare.els1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent@2.0.21-4.el7.tuxcare.els1?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libevent-devel-0:2.0.21-4.el7.tuxcare.els1.x86_64",
                "product": {
                  "name": "libevent-devel-0:2.0.21-4.el7.tuxcare.els1.x86_64",
                  "product_id": "libevent-devel-0:2.0.21-4.el7.tuxcare.els1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent-devel@2.0.21-4.el7.tuxcare.els1?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libevent-0:2.0.21-4.el7.tuxcare.els2.x86_64",
                "product": {
                  "name": "libevent-0:2.0.21-4.el7.tuxcare.els2.x86_64",
                  "product_id": "libevent-0:2.0.21-4.el7.tuxcare.els2.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent@2.0.21-4.el7.tuxcare.els2?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libevent-devel-0:2.0.21-4.el7.tuxcare.els2.x86_64",
                "product": {
                  "name": "libevent-devel-0:2.0.21-4.el7.tuxcare.els2.x86_64",
                  "product_id": "libevent-devel-0:2.0.21-4.el7.tuxcare.els2.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent-devel@2.0.21-4.el7.tuxcare.els2?arch=x86_64"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "libevent-0:2.0.21-4.el7.tuxcare.els1.i686",
                "product": {
                  "name": "libevent-0:2.0.21-4.el7.tuxcare.els1.i686",
                  "product_id": "libevent-0:2.0.21-4.el7.tuxcare.els1.i686",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent@2.0.21-4.el7.tuxcare.els1?arch=i686"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libevent-devel-0:2.0.21-4.el7.tuxcare.els1.i686",
                "product": {
                  "name": "libevent-devel-0:2.0.21-4.el7.tuxcare.els1.i686",
                  "product_id": "libevent-devel-0:2.0.21-4.el7.tuxcare.els1.i686",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent-devel@2.0.21-4.el7.tuxcare.els1?arch=i686"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libevent-0:2.0.21-4.el7.tuxcare.els2.i686",
                "product": {
                  "name": "libevent-0:2.0.21-4.el7.tuxcare.els2.i686",
                  "product_id": "libevent-0:2.0.21-4.el7.tuxcare.els2.i686",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent@2.0.21-4.el7.tuxcare.els2?arch=i686"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libevent-devel-0:2.0.21-4.el7.tuxcare.els2.i686",
                "product": {
                  "name": "libevent-devel-0:2.0.21-4.el7.tuxcare.els2.i686",
                  "product_id": "libevent-devel-0:2.0.21-4.el7.tuxcare.els2.i686",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent-devel@2.0.21-4.el7.tuxcare.els2?arch=i686"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "i686"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "libevent-doc-0:2.0.21-4.el7.tuxcare.els1.noarch",
                "product": {
                  "name": "libevent-doc-0:2.0.21-4.el7.tuxcare.els1.noarch",
                  "product_id": "libevent-doc-0:2.0.21-4.el7.tuxcare.els1.noarch",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent-doc@2.0.21-4.el7.tuxcare.els1?arch=noarch"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libevent-doc-0:2.0.21-4.el7.tuxcare.els2.noarch",
                "product": {
                  "name": "libevent-doc-0:2.0.21-4.el7.tuxcare.els2.noarch",
                  "product_id": "libevent-doc-0:2.0.21-4.el7.tuxcare.els2.noarch",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/libevent-doc@2.0.21-4.el7.tuxcare.els2?arch=noarch"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "noarch"
          }
        ],
        "category": "vendor",
        "name": "CloudLinux"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-0:2.0.21-4.el7.tuxcare.els1.x86_64 as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-0:2.0.21-4.el7.tuxcare.els1.x86_64"
        },
        "product_reference": "libevent-0:2.0.21-4.el7.tuxcare.els1.x86_64",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-0:2.0.21-4.el7.tuxcare.els1.i686 as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-0:2.0.21-4.el7.tuxcare.els1.i686"
        },
        "product_reference": "libevent-0:2.0.21-4.el7.tuxcare.els1.i686",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-doc-0:2.0.21-4.el7.tuxcare.els1.noarch as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-doc-0:2.0.21-4.el7.tuxcare.els1.noarch"
        },
        "product_reference": "libevent-doc-0:2.0.21-4.el7.tuxcare.els1.noarch",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-devel-0:2.0.21-4.el7.tuxcare.els1.i686 as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.tuxcare.els1.i686"
        },
        "product_reference": "libevent-devel-0:2.0.21-4.el7.tuxcare.els1.i686",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-devel-0:2.0.21-4.el7.tuxcare.els1.x86_64 as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.tuxcare.els1.x86_64"
        },
        "product_reference": "libevent-devel-0:2.0.21-4.el7.tuxcare.els1.x86_64",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-0:2.0.21-4.el7.tuxcare.els2.x86_64 as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-0:2.0.21-4.el7.tuxcare.els2.x86_64"
        },
        "product_reference": "libevent-0:2.0.21-4.el7.tuxcare.els2.x86_64",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-0:2.0.21-4.el7.tuxcare.els2.i686 as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-0:2.0.21-4.el7.tuxcare.els2.i686"
        },
        "product_reference": "libevent-0:2.0.21-4.el7.tuxcare.els2.i686",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-devel-0:2.0.21-4.el7.tuxcare.els2.x86_64 as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.tuxcare.els2.x86_64"
        },
        "product_reference": "libevent-devel-0:2.0.21-4.el7.tuxcare.els2.x86_64",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-devel-0:2.0.21-4.el7.tuxcare.els2.i686 as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.tuxcare.els2.i686"
        },
        "product_reference": "libevent-devel-0:2.0.21-4.el7.tuxcare.els2.i686",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-doc-0:2.0.21-4.el7.tuxcare.els2.noarch as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-doc-0:2.0.21-4.el7.tuxcare.els2.noarch"
        },
        "product_reference": "libevent-doc-0:2.0.21-4.el7.tuxcare.els2.noarch",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-0:2.0.21-4.el7.x86_64 as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-0:2.0.21-4.el7.x86_64"
        },
        "product_reference": "libevent-0:2.0.21-4.el7.x86_64",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-0:2.0.21-4.el7.i686 as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-0:2.0.21-4.el7.i686"
        },
        "product_reference": "libevent-0:2.0.21-4.el7.i686",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-devel-0:2.0.21-4.el7.x86_64 as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.x86_64"
        },
        "product_reference": "libevent-devel-0:2.0.21-4.el7.x86_64",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-devel-0:2.0.21-4.el7.i686 as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.i686"
        },
        "product_reference": "libevent-devel-0:2.0.21-4.el7.i686",
        "relates_to_product_reference": "CloudLinux-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-doc-0:2.0.21-4.el7.noarch as a component of CloudLinux 7",
          "product_id": "CloudLinux-7:libevent-doc-0:2.0.21-4.el7.noarch"
        },
        "product_reference": "libevent-doc-0:2.0.21-4.el7.noarch",
        "relates_to_product_reference": "CloudLinux-7"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-63384",
      "cwe": {
        "id": "CWE-190",
        "name": "Integer Overflow or Wraparound"
      },
      "notes": [
        {
          "category": "description",
          "text": "Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has an incorrect integer conversion in event_tagging.c when evtag_unmarshal_header uses evtag_decode_int to decode an attacker-controlled uint32 payload length and returns it as a signed int. Values above INT_MAX become negative or truncated, and evtag_unmarshal_string can use the converted value in allocation sizing, producing a wrapped large allocation request and denial of service. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.",
          "title": "Vulnerability description"
        }
      ],
      "product_status": {
        "fixed": [
          "CloudLinux-7:libevent-0:2.0.21-4.el7.tuxcare.els2.i686",
          "CloudLinux-7:libevent-0:2.0.21-4.el7.tuxcare.els2.x86_64",
          "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.tuxcare.els2.i686",
          "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.tuxcare.els2.x86_64",
          "CloudLinux-7:libevent-doc-0:2.0.21-4.el7.tuxcare.els2.noarch"
        ],
        "known_affected": [
          "CloudLinux-7:libevent-0:2.0.21-4.el7.i686",
          "CloudLinux-7:libevent-0:2.0.21-4.el7.tuxcare.els1.i686",
          "CloudLinux-7:libevent-0:2.0.21-4.el7.tuxcare.els1.x86_64",
          "CloudLinux-7:libevent-0:2.0.21-4.el7.x86_64",
          "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.i686",
          "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.tuxcare.els1.i686",
          "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.tuxcare.els1.x86_64",
          "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.x86_64",
          "CloudLinux-7:libevent-doc-0:2.0.21-4.el7.noarch",
          "CloudLinux-7:libevent-doc-0:2.0.21-4.el7.tuxcare.els1.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-63384"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/commit/109c16499282959d70f56ec3baf4c8b1e6646bda",
          "url": "https://github.com/libevent/libevent/commit/109c16499282959d70f56ec3baf4c8b1e6646bda"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/commit/5e3c6ebe342b34c5a9bcf48e9a32ad6708b9c416",
          "url": "https://github.com/libevent/libevent/commit/5e3c6ebe342b34c5a9bcf48e9a32ad6708b9c416"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/security/advisories/GHSA-45c6-qx49-89m8",
          "url": "https://github.com/libevent/libevent/security/advisories/GHSA-45c6-qx49-89m8"
        }
      ],
      "release_date": "2026-08-20T18:16:00Z",
      "remediations": [
        {
          "category": "none_available",
          "date": "2026-10-19T19:28:48.740529Z",
          "details": "Affected",
          "product_ids": [
            "CloudLinux-7:libevent-0:2.0.21-4.el7.i686",
            "CloudLinux-7:libevent-0:2.0.21-4.el7.tuxcare.els1.i686",
            "CloudLinux-7:libevent-0:2.0.21-4.el7.tuxcare.els1.x86_64",
            "CloudLinux-7:libevent-0:2.0.21-4.el7.x86_64",
            "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.i686",
            "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.tuxcare.els1.i686",
            "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.tuxcare.els1.x86_64",
            "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.x86_64",
            "CloudLinux-7:libevent-doc-0:2.0.21-4.el7.noarch",
            "CloudLinux-7:libevent-doc-0:2.0.21-4.el7.tuxcare.els1.noarch"
          ]
        },
        {
          "category": "vendor_fix",
          "date": "2026-10-23T08:46:22.777730Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1792745181",
          "product_ids": [
            "CloudLinux-7:libevent-0:2.0.21-4.el7.tuxcare.els2.i686",
            "CloudLinux-7:libevent-0:2.0.21-4.el7.tuxcare.els2.x86_64",
            "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.tuxcare.els2.i686",
            "CloudLinux-7:libevent-devel-0:2.0.21-4.el7.tuxcare.els2.x86_64",
            "CloudLinux-7:libevent-doc-0:2.0.21-4.el7.tuxcare.els2.noarch"
          ],
          "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1792745181"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ]
    }
  ]
}