{"id":"CVE-2022-43680","title":"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.","summary":"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.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-416","CWE-416"],"vendor":"libexpat_project","product":"libexpat","affected":["libexpat <= 2.4.9","debian_linux = 10.0","debian_linux = 11.0","fedora = 35","fedora = 36","fedora = 37","h300s_firmware","h500s_firmware","h700s_firmware","h410s_firmware","h410c_firmware","active_iq_unified_manager","oncommand_workflow_automation","solidfire_&_hci_management_node","hci_compute_node_firmware"],"published":"2022-10-24","updated":"2026-10-14","sourceUpdated":"2026-10-14T19:16:53.627","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2022-43680","references":[{"url":"http://www.openwall.com/lists/oss-security/2023/12/28/5","label":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2024/01/03/5","label":"cve@mitre.org"},{"url":"https://github.com/libexpat/libexpat/issues/649","label":"cve@mitre.org"},{"url":"https://github.com/libexpat/libexpat/pull/616","label":"cve@mitre.org"},{"url":"https://github.com/libexpat/libexpat/pull/650","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2022/10/msg00033.html","label":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AJ5VY2VYXE4WTRGQ6LMGLF6FV3SY37YE/","label":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BY4OPSIB33ETNUXZY2UPZ4NGQ3OKDY4D/","label":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DPQVIF6TOJNY2T3ZZETFKR4G34FFREBQ/","label":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFCOMBSOJKLIKCGCJWHLJXO4EVYBG7AR/","label":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUJ2BULJTZ2BMSKQHB6US674P55UCWWS/","label":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XG5XOOB7CD55CEE6OJYKSACSIMQ4RWQ6/","label":"cve@mitre.org"},{"url":"https://security.gentoo.org/glsa/202210-38","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20221118-0007/","label":"cve@mitre.org"},{"url":"https://www.debian.org/security/2022/dsa-5266","label":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2023/12/28/5","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2024/01/03/5","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/libexpat/libexpat/issues/649","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/libexpat/libexpat/pull/616","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/libexpat/libexpat/pull/650","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2022/10/msg00033.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AJ5VY2VYXE4WTRGQ6LMGLF6FV3SY37YE/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BY4OPSIB33ETNUXZY2UPZ4NGQ3OKDY4D/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DPQVIF6TOJNY2T3ZZETFKR4G34FFREBQ/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFCOMBSOJKLIKCGCJWHLJXO4EVYBG7AR/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUJ2BULJTZ2BMSKQHB6US674P55UCWWS/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XG5XOOB7CD55CEE6OJYKSACSIMQ4RWQ6/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202210-38","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20221118-0007/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2022/dsa-5266","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-892048.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","exploit-available"],"epss":0.02457,"epssPercentile":0.84105,"exploits":{"github":2,"githubRepos":["https://github.com/Trinadh465/external_expat-2.1.0_CVE-2022-43680","https://github.com/nidhihcl/external_expat_2.1.0_CVE-2022-43680"],"checkedAt":"2026-10-14T19:50:33.260Z"},"exploitAvailable":true,"ingestedAt":"2026-10-14T19:49:57.522Z","slug":"CVE-2022-43680","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `libexpat <= 2.4.9`\n- `debian_linux = 10.0`\n- `debian_linux = 11.0`\n- `fedora = 35`\n- `fedora = 36`\n- `fedora = 37`\n- `h300s_firmware`\n- `h500s_firmware`\n- `h700s_firmware`\n- `h410s_firmware`\n- `h410c_firmware`\n- `active_iq_unified_manager`\n- `oncommand_workflow_automation`\n- `solidfire_&_hci_management_node`\n- `hci_compute_node_firmware`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":41.3,"likelihood":0.5,"exploitation":12,"ransomware":0},"changes":[]}