{
  "threat_severity" : "Moderate",
  "public_date" : "2022-10-24T00:00:00Z",
  "bugzilla" : {
    "description" : "expat: use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate",
    "id" : "2140059",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2140059"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-416",
  "details" : [ "In libexpat through 2.4.9, there is a use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations.", "A use-after-free flaw was found in the Expat package, caused by destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations. This may lead to availability disruptions." ],
  "statement" : "This vulnerability can only happen under special (out-of-memory) conditions, thus it is not possible to exploit on every possible system that has expat installed. Additionally as the flaw is only capable of causing a Denial of Service, Red Hat rates the impact as Moderate.",
  "affected_release" : [ {
    "product_name" : "JBCS httpd 2.4.51.sp2",
    "release_date" : "2023-06-05T00:00:00Z",
    "advisory" : "RHSA-2023:3355",
    "cpe" : "cpe:/a:redhat:jboss_core_services:1",
    "package" : "expat"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2022-11-21T00:00:00Z",
    "advisory" : "RHSA-2022:8554",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8",
    "package" : "firefox-0:102.5.0-1.el8_7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2023-01-12T00:00:00Z",
    "advisory" : "RHSA-2023:0103",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "expat-0:2.2.5-10.el8_7.1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions",
    "release_date" : "2022-11-21T00:00:00Z",
    "advisory" : "RHSA-2022:8553",
    "cpe" : "cpe:/a:redhat:rhel_e4s:8.1",
    "package" : "firefox-0:102.5.0-1.el8_1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Advanced Update Support",
    "release_date" : "2022-11-21T00:00:00Z",
    "advisory" : "RHSA-2022:8550",
    "cpe" : "cpe:/a:redhat:rhel_aus:8.2",
    "package" : "firefox-0:102.5.0-1.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Advanced Update Support",
    "release_date" : "2025-12-09T00:00:00Z",
    "advisory" : "RHSA-2025:22871",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.2",
    "package" : "expat-0:2.2.10-1.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Telecommunications Update Service",
    "release_date" : "2022-11-21T00:00:00Z",
    "advisory" : "RHSA-2022:8550",
    "cpe" : "cpe:/a:redhat:rhel_tus:8.2",
    "package" : "firefox-0:102.5.0-1.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions",
    "release_date" : "2022-11-21T00:00:00Z",
    "advisory" : "RHSA-2022:8550",
    "cpe" : "cpe:/a:redhat:rhel_e4s:8.2",
    "package" : "firefox-0:102.5.0-1.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
    "release_date" : "2025-12-04T00:00:00Z",
    "advisory" : "RHSA-2025:22785",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.4",
    "package" : "expat-0:2.2.10-1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Extended Update Support",
    "release_date" : "2022-11-21T00:00:00Z",
    "advisory" : "RHSA-2022:8549",
    "cpe" : "cpe:/a:redhat:rhel_eus:8.4",
    "package" : "firefox-0:102.5.0-1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
    "release_date" : "2025-12-04T00:00:00Z",
    "advisory" : "RHSA-2025:22785",
    "cpe" : "cpe:/o:redhat:rhel_eus_long_life:8.4",
    "package" : "expat-0:2.2.10-1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Extended Update Support",
    "release_date" : "2022-11-21T00:00:00Z",
    "advisory" : "RHSA-2022:8548",
    "cpe" : "cpe:/a:redhat:rhel_eus:8.6",
    "package" : "firefox-0:102.5.0-1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Extended Update Support",
    "release_date" : "2024-01-25T00:00:00Z",
    "advisory" : "RHSA-2024:0421",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.6",
    "package" : "expat-0:2.2.5-8.el8_6.4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-01-23T00:00:00Z",
    "advisory" : "RHSA-2023:0337",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "expat-0:2.4.9-1.el9_1.1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-01-23T00:00:00Z",
    "advisory" : "RHSA-2023:0337",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "expat-0:2.4.9-1.el9_1.1"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "compat-expat1",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "expat",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Will not fix",
    "package_name" : "expat",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Affected",
    "package_name" : "firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Affected",
    "package_name" : "thunderbird",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Out of support scope",
    "package_name" : "firefox:flatpak/firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "thunderbird",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Will not fix",
    "package_name" : "thunderbird:flatpak/thunderbird",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "xmlrpc-c",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "firefox:flatpak/firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "thunderbird",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "thunderbird:flatpak/thunderbird",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2022-43680\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-43680\nhttps://github.com/libexpat/libexpat/issues/649" ],
  "name" : "CVE-2022-43680",
  "csaw" : false
}