{"id":"CVE-2022-22822","title":"addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.","summary":"addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-190","CWE-190"],"vendor":"libexpat_project","product":"libexpat","affected":["libexpat < 2.4.3","nessus < 8.15.3","nessus >= 10.0.0, < 10.1.1","sinema_remote_connect_server < 3.1","debian_linux = 10.0","debian_linux = 11.0"],"patched":["libexpat 2.4.3","nessus 10.1.1","sinema_remote_connect_server 3.1"],"published":"2022-01-10","updated":"2026-10-14","sourceUpdated":"2026-10-14T16:17:25.380","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2022-22822","references":[{"url":"http://www.openwall.com/lists/oss-security/2022/01/17/3","label":"cve@mitre.org"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf","label":"cve@mitre.org"},{"url":"https://github.com/libexpat/libexpat/pull/539","label":"cve@mitre.org"},{"url":"https://security.gentoo.org/glsa/202209-24","label":"cve@mitre.org"},{"url":"https://www.debian.org/security/2022/dsa-5073","label":"cve@mitre.org"},{"url":"https://www.tenable.com/security/tns-2022-05","label":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2022/01/17/3","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/libexpat/libexpat/pull/539","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202209-24","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2022/dsa-5073","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.tenable.com/security/tns-2022-05","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-484086.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","exploit-available"],"epss":0.04829,"epssPercentile":0.91801,"exploits":{"github":1,"githubRepos":["https://github.com/nanopathi/external_expat_AOSP10_r33_CVE-2022-22822toCVE-2022-22827"],"checkedAt":"2026-10-14T16:41:07.234Z"},"exploitAvailable":true,"ingestedAt":"2026-10-14T16:40:32.041Z","slug":"CVE-2022-22822","body":"## Overview\n\naddBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.\n\n## Affected\n\n- `libexpat < 2.4.3`\n- `nessus < 8.15.3`\n- `nessus >= 10.0.0, < 10.1.1`\n- `sinema_remote_connect_server < 3.1`\n- `debian_linux = 10.0`\n- `debian_linux = 11.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `libexpat 2.4.3`\n- `nessus 10.1.1`\n- `sinema_remote_connect_server 3.1`","depth":"abyssal","depthScore":67,"depthScoreParts":{"impact":53.9,"likelihood":1,"exploitation":12,"ransomware":0},"changes":[]}