{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Moderate"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "title": "buffer overflow read vulnerability",
    "tracking": {
      "current_release_date": "2026-08-11T14:59:19+00:00",
      "generator": {
        "date": "2026-08-11T14:59:19+00:00",
        "engine": {
          "name": "CSAF Generator",
          "version": "3.3.0"
        }
      },
      "id": "CVE-2021-3643",
      "initial_release_date": "2021-08-12T00:00:00+00:00",
      "revision_history": [
        {
          "date": "2026-08-11T14:59:19+00:00",
          "number": "1",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "category": "vendor",
        "name": "Red Hat",
        "branches": [
          {
            "category": "product_name",
            "name": "Red Hat Enterprise Linux 5.11",
            "product": {
              "name": "Red Hat Enterprise Linux 5.11",
              "product_id": "rhel-5.11.z.els",
              "product_identification_helper": {
                "cpe": "cpe:/o:redhat:rhel_els:5"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Red Hat Enterprise Linux 6-els",
            "product": {
              "name": "Red Hat Enterprise Linux 6-els",
              "product_id": "rhel-6-els.els",
              "product_identification_helper": {
                "cpe": "cpe:/o:redhat:rhel_els:6"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Red Hat Enterprise Linux 7-els",
            "product": {
              "name": "Red Hat Enterprise Linux 7-els",
              "product_id": "rhel-7-els.els",
              "product_identification_helper": {
                "cpe": "cpe:/o:redhat:rhel_els:7"
              }
            }
          },
          {
            "category": "product_version",
            "name": "sox",
            "product": {
              "name": "sox",
              "product_id": "sox",
              "product_identification_helper": {
                "purl": "pkg:rpm/redhat/sox"
              }
            }
          },
          {
            "category": "product_version",
            "name": "sox-debuginfo",
            "product": {
              "name": "sox-debuginfo",
              "product_id": "sox-debuginfo",
              "product_identification_helper": {
                "purl": "pkg:rpm/redhat/sox-debuginfo"
              }
            }
          },
          {
            "category": "product_version",
            "name": "sox-devel",
            "product": {
              "name": "sox-devel",
              "product_id": "sox-devel",
              "product_identification_helper": {
                "purl": "pkg:rpm/redhat/sox-devel"
              }
            }
          },
          {
            "category": "product_version",
            "name": "sox",
            "product": {
              "name": "sox",
              "product_id": "sox.src",
              "product_identification_helper": {
                "purl": "pkg:rpm/redhat/sox?arch=src"
              }
            }
          }
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      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "sox as a component of Red Hat Enterprise Linux 6-els",
          "product_id": "rhel-6-els.els:sox"
        },
        "product_reference": "sox",
        "relates_to_product_reference": "rhel-6-els.els"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "sox as a component of Red Hat Enterprise Linux 7-els",
          "product_id": "rhel-7-els.els:sox"
        },
        "product_reference": "sox",
        "relates_to_product_reference": "rhel-7-els.els"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "sox-debuginfo as a component of Red Hat Enterprise Linux 7-els",
          "product_id": "rhel-7-els.els:sox-debuginfo"
        },
        "product_reference": "sox-debuginfo",
        "relates_to_product_reference": "rhel-7-els.els"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "sox-debuginfo as a component of Red Hat Enterprise Linux 6-els",
          "product_id": "rhel-6-els.els:sox-debuginfo"
        },
        "product_reference": "sox-debuginfo",
        "relates_to_product_reference": "rhel-6-els.els"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "sox-devel as a component of Red Hat Enterprise Linux 7-els",
          "product_id": "rhel-7-els.els:sox-devel"
        },
        "product_reference": "sox-devel",
        "relates_to_product_reference": "rhel-7-els.els"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "sox-devel as a component of Red Hat Enterprise Linux 6-els",
          "product_id": "rhel-6-els.els:sox-devel"
        },
        "product_reference": "sox-devel",
        "relates_to_product_reference": "rhel-6-els.els"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "sox.src as a component of Red Hat Enterprise Linux 7-els",
          "product_id": "rhel-7-els.els:sox.src"
        },
        "product_reference": "sox.src",
        "relates_to_product_reference": "rhel-7-els.els"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "sox.src as a component of Red Hat Enterprise Linux 5.11",
          "product_id": "rhel-5.11.z.els:sox.src"
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        "product_reference": "sox.src",
        "relates_to_product_reference": "rhel-5.11.z.els"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "sox.src as a component of Red Hat Enterprise Linux 6-els",
          "product_id": "rhel-6-els.els:sox.src"
        },
        "product_reference": "sox.src",
        "relates_to_product_reference": "rhel-6-els.els"
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    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-3643",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "discovery_date": "2021-07-09T00:00:00+00:00",
      "flags": [
        {
          "label": "vulnerable_code_not_present",
          "product_ids": [
            "rhel-6-els.els:sox-debuginfo",
            "rhel-6-els.els:sox-devel",
            "rhel-7-els.els:sox-debuginfo",
            "rhel-7-els.els:sox-devel"
          ]
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in sox. The lsx_adpcm_init function within libsox leads to a global-buffer-overflow. This flaw allows an attacker to input a malicious file, leading to the disclosure of sensitive information.",
          "title": "Vulnerability description"
        }
      ],
      "product_status": {
        "known_affected": [
          "rhel-5.11.z.els:sox.src",
          "rhel-6-els.els:sox",
          "rhel-6-els.els:sox.src",
          "rhel-7-els.els:sox",
          "rhel-7-els.els:sox.src"
        ],
        "known_not_affected": [
          "rhel-6-els.els:sox-debuginfo",
          "rhel-6-els.els:sox-devel",
          "rhel-7-els.els:sox-debuginfo",
          "rhel-7-els.els:sox-devel"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2021-3643"
        },
        {
          "category": "external",
          "summary": "nvd.nist.gov",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3643"
        },
        {
          "category": "external",
          "summary": "www.cve.org",
          "url": "https://www.cve.org/CVERecord?id=CVE-2021-3643"
        }
      ],
      "remediations": [
        {
          "category": "no_fix_planned",
          "details": "Out of support scope",
          "product_ids": [
            "rhel-5.11.z.els:sox.src",
            "rhel-6-els.els:sox",
            "rhel-6-els.els:sox.src",
            "rhel-7-els.els:sox",
            "rhel-7-els.els:sox.src"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM"
          },
          "products": [
            "rhel-5.11.z.els:sox.src",
            "rhel-6-els.els:sox",
            "rhel-6-els.els:sox-debuginfo",
            "rhel-6-els.els:sox-devel",
            "rhel-6-els.els:sox.src",
            "rhel-7-els.els:sox",
            "rhel-7-els.els:sox-debuginfo",
            "rhel-7-els.els:sox-devel",
            "rhel-7-els.els:sox.src"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate",
          "product_ids": [
            "rhel-5.11.z.els:sox.src",
            "rhel-6-els.els:sox",
            "rhel-6-els.els:sox-debuginfo",
            "rhel-6-els.els:sox-devel",
            "rhel-6-els.els:sox.src",
            "rhel-7-els.els:sox",
            "rhel-7-els.els:sox-debuginfo",
            "rhel-7-els.els:sox-devel",
            "rhel-7-els.els:sox.src"
          ]
        }
      ],
      "title": "buffer overflow read vulnerability"
    }
  ]
}