{"id":"CVE-2023-28484","title":"In libxml2 before 2.10.4, parsing of certain invalid XSD schemas can lead to a NULL pointer dereference and subsequently a segfault","summary":"In libxml2 before 2.10.4, parsing of certain invalid XSD schemas can lead to a NULL pointer dereference and subsequently a segfault. This occurs in xmlSchemaFixupComplexType in xmlschemas.c.","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-476","CWE-476"],"vendor":"xmlsoft","product":"libxml2","affected":["libxml2 < 2.10.4","debian_linux = 10.0"],"patched":["libxml2 2.10.4"],"published":"2023-04-24","updated":"2026-10-14","sourceUpdated":"2026-10-14T23:17:17.197","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-28484","references":[{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/issues/491","label":"cve@mitre.org"},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.10.4","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2023/04/msg00031.html","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20230601-0006/","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20240201-0005/","label":"cve@mitre.org"},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/issues/491","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.10.4","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2023/04/msg00031.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20230601-0006/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20240201-0005/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-341067.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"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-556635.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-625862.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-769027.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd"],"epss":0.00941,"epssPercentile":0.60152,"ingestedAt":"2026-10-15T00:02:07.132Z","slug":"CVE-2023-28484","body":"## Overview\n\nIn libxml2 before 2.10.4, parsing of certain invalid XSD schemas can lead to a NULL pointer dereference and subsequently a segfault. This occurs in xmlSchemaFixupComplexType in xmlschemas.c.\n\n## Affected\n\n- `libxml2 < 2.10.4`\n- `debian_linux = 10.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `libxml2 2.10.4`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}