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Medium

Security advisory

Type: advisorySources: OSVCVE: CVE-2021-3537

A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2021-3537
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 09:29 UTC · Revision 1

Source evidence

CVE-2021-3537

core-osv · Original source

Published 14 May 2021, 20:15 UTC

A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.

osv:CVE-2021-3537
Complete source record
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    "evidence": "osv:CVE-2021-3537",
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    "severity": "medium",
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                    "240624245583924818381392266620352655927",
                    "223174899253645334504338538819361168413",
                    "294476493037697202535040764027097131119",
                    "129304591418198192271541858825325701656",
                    "140204848231080657012011575632498051783",
                    "75311632195512841680531928924350830586",
                    "256053888072821081238103619703165798762",
                    "235378452580802392739918607691411522119",
                    "244992818881073020881304797438692585130",
                    "66651940352215863530508914348900210359",
                    "48019944339009281467628355593178272818",
                    "106918772490863171659640772695582053951",
                    "116925370429586760959130651896312835976",
                    "148133004854708868535797103792350393744",
                    "102183146399774788380381559441867815797",
                    "308117370035021215489377534456228663968",
                    "187339639605561687559806077174150854909",
                    "130836858511549172127312257489846408951",
                    "52797561731550596294797782502825671297",
                    "313419538420946173683294680071732735569",
                    "246138447249870484217065672110268629284"
                  ]
                },
                "source": "https://gitlab.gnome.org/gnome/libxml2@e1bcffea180d6cc0651757bb64284a763e0e2239",
                "target": {
                  "file": "testapi.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-3537-88b79f4c",
                "digest": {
                  "length": 1155,
                  "function_hash": "198329610838053062539893085088781189951"
                },
                "source": "https://gitlab.gnome.org/gnome/libxml2@e1bcffea180d6cc0651757bb64284a763e0e2239",
                "target": {
                  "file": "testapi.c",
                  "function": "test_xmlIO"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-24T14:51:07Z"
          }
        }
      ],
      "modified": "2026-10-24T14:51:07.596907528Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-398330.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/",
        "https://www.oracle.com/security-alerts/cpujul2022.html",
        "https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html",
        "https://security.gentoo.org/glsa/202107-05",
        "https://security.netapp.com/advisory/ntap-20210625-0002/",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1956522",
        "https://www.oracle.com/security-alerts/cpuapr2022.html",
        "https://www.oracle.com/security-alerts/cpuoct2021.html"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:mysql_workbench",
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "8.0.26"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "9.0"
                  },
                  {
                    "last_affected": "9.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "33"
                  },
                  {
                    "last_affected": "33"
                  },
                  {
                    "introduced": "34"
                  },
                  {
                    "last_affected": "34"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:communications_cloud_native_core_network_function_cloud_native_environment",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.10.0"
                  },
                  {
                    "last_affected": "1.10.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:oracle:enterprise_manager_base_platform:13.4.0.0:*:*:*:*:*:*:*",
              "cpe:2.3:a:oracle:enterprise_manager_base_platform:13.5.0.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:enterprise_manager_base_platform",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "13.4.0.0"
                  },
                  {
                    "last_affected": "13.4.0.0"
                  },
                  {
                    "introduced": "13.5.0.0"
                  },
                  {
                    "last_affected": "13.5.0.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:enterprise_manager_ops_center",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "12.4.0.0"
                  },
                  {
                    "last_affected": "12.4.0.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:oracle:openjdk:8:update301:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:openjdk",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8-update301"
                  },
                  {
                    "last_affected": "8-update301"
                  },
                  {
                    "introduced": "8-update301"
                  },
                  {
                    "last_affected": "8-update301"
                  },
                  {
                    "introduced": "8-update301"
                  },
                  {
                    "last_affected": "8-update301"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:peoplesoft_enterprise_peopletools",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.58"
                  },
                  {
                    "last_affected": "8.58"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:oracle:real_user_experience_insight:13.4.1.0:*:*:*:*:*:*:*",
              "cpe:2.3:a:oracle:real_user_experience_insight:13.5.1.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:real_user_experience_insight",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "13.4.1.0"
                  },
                  {
                    "last_affected": "13.4.1.0"
                  },
                  {
                    "introduced": "13.5.1.0"
                  },
                  {
                    "last_affected": "13.5.1.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:enterprise_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "6.0"
                  },
                  {
                    "last_affected": "6.0"
                  },
                  {
                    "introduced": "7.0"
                  },
                  {
                    "last_affected": "7.0"
                  },
                  {
                    "introduced": "8.0"
                  },
                  {
                    "last_affected": "8.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-3537",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 443865,
  "published_at": "2021-05-14T20:15:16.553+00:00"
}