{"schemaVersion":3,"id":"CVE-2023-28484","aliases":["ALPINE-CVE-2023-28484","UBUNTU-CVE-2023-28484","DEBIAN-CVE-2023-28484"],"status":"published","duplicateOf":null,"title":null,"description":"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.","dates":{"published":"2023-04-24T00:00:00.000Z","modified":"2026-10-14T22:54:53.775Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Alpine","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01245,"percentile":0.68851,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.15899999999999995,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.01086},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01234,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01234,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01234,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01234,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01245,"percentile":0.68851}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01086,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00941,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01234,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01234,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01234,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01234,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01245,"percentile":0.68851}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_675D89C3116795C2","name":"Exploit Reference (gitlab.gnome.org)","source":"reference","url":"https://gitlab.gnome.org/GNOME/libxml2/-/issues/491","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-476","name":"NULL Pointer Dereference","description":"The product dereferences a pointer that it expects to be valid but is NULL.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/476.html"}],"affected":[{"vendor":"alpine","product":"libxml2","name":"libxml2","label":"libxml2","ecosystem":"Alpine Linux","cpePart":null,"purl":"pkg:apk/alpine/libxml2","purlType":"apk","versions":[{"text":"< 2.10.4-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.10.4-r0","eol":null,"hubHref":null},{"vendor":"debian","product":"libxml2","name":"libxml2","label":"libxml2","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libxml2","purlType":"deb","versions":[{"text":"< 2.9.14+dfsg-1.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.9.14+dfsg-1.2","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"libxml2","name":"libxml2","label":"libxml2","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libxml2","purlType":"deb","versions":[{"text":"< 2.9.1+dfsg1-3ubuntu4.13+esm5","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.3+dfsg1-1ubuntu0.7+esm5","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.4+dfsg1-6.1ubuntu1.9","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.10+dfsg-5ubuntu0.20.04.6","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.13+dfsg-1ubuntu0.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.9.1+dfsg1-3ubuntu4.13+esm5 | < 2.9.3+dfsg1-1ubuntu0.7+esm5 | < 2.9.4+dfsg1-6.1ubuntu1.9 | < 2.9.10+dfsg-5ubuntu0.20.04.6 | < 2.9.13+dfsg-1ubuntu0.3","eol":null,"hubHref":null},{"vendor":"debian","product":"debian_linux","name":"debian linux","label":"debian_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"10.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"10.0","eol":{"isEol":true,"eolDate":"2024-06-30T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"10","label":"10 (Buster)","eolFrom":"2024-06-30T00:00:00.000Z","isLts":false,"isMaintained":true,"latestVersion":"10.13"},"product":{"name":"debian","label":"Debian","category":"os"}},"hubHref":"/vendor/debian/debian_linux"},{"vendor":"xmlsoft","product":"libxml2","name":"libxml2","label":"libxml2","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 2.10.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.10.4","eol":null,"hubHref":"/vendor/xmlsoft/libxml2"}],"affectedCount":5,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.10.4","label":"gitlab.gnome.org/GNOME/libxml2/-/releases/v2.10.4","hostname":"gitlab.gnome.org","tags":["REPORT","Release Notes"]},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/issues/491","label":"gitlab.gnome.org/GNOME/libxml2/-/issues/491","hostname":"gitlab.gnome.org","tags":["Exploit","Issue Tracking","Patch","Vendor Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/04/msg00031.html","label":"lists.debian.org/debian-lts-announce/2023/04/msg00031.html","hostname":"lists.debian.org","tags":["Mailing List","Third Party Advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20230601-0006/","label":"security.netapp.com/advisory/ntap-20230601-0006/","hostname":"security.netapp.com","tags":[]},{"url":"https://security.netapp.com/advisory/ntap-20240201-0005/","label":"security.netapp.com/advisory/ntap-20240201-0005/","hostname":"security.netapp.com","tags":[]},{"url":"https://security.alpinelinux.org/vuln/CVE-2023-28484","label":"security.alpinelinux.org/vuln/CVE-2023-28484","hostname":"security.alpinelinux.org","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-28484","label":"ubuntu.com/security/CVE-2023-28484","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://access.redhat.com/security/cve/CVE-2023-28484","label":"access.redhat.com/security/cve/CVE-2023-28484","hostname":"access.redhat.com","tags":["REPORT"]},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/commit/647e072ea0a2f12687fa05c172f4c4713fdb0c4f","label":"gitlab.gnome.org/GNOME/libxml2/-/commit/647e072ea0a2f12687fa05c172f4c4713fdb0c4f","hostname":"gitlab.gnome.org","tags":["REPORT"]},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/commit/4c6922f763ad958c48ff66f82823ae21f2e92ee6","label":"gitlab.gnome.org/GNOME/libxml2/-/commit/4c6922f763ad958c48ff66f82823ae21f2e92ee6","hostname":"gitlab.gnome.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-6028-1","label":"ubuntu.com/security/notices/USN-6028-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-6028-2","label":"ubuntu.com/security/notices/USN-6028-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-28484","label":"www.cve.org/CVERecord?id=CVE-2023-28484","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-28484","label":"security-tracker.debian.org/tracker/CVE-2023-28484","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-28484","label":"nvd.nist.gov/vuln/detail/CVE-2023-28484","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html","label":"cert-portal.siemens.com/productcert/html/ssa-398330.html","hostname":"cert-portal.siemens.com","tags":[]},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-556635.html","label":"cert-portal.siemens.com/productcert/html/ssa-556635.html","hostname":"cert-portal.siemens.com","tags":[]},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-625862.html","label":"cert-portal.siemens.com/productcert/html/ssa-625862.html","hostname":"cert-portal.siemens.com","tags":[]},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-341067.html","label":"cert-portal.siemens.com/productcert/html/ssa-341067.html","hostname":"cert-portal.siemens.com","tags":[]},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-769027.html","label":"cert-portal.siemens.com/productcert/html/ssa-769027.html","hostname":"cert-portal.siemens.com","tags":[]}],"lineage":{"upstream":[],"downstream":["DLA-3405-1","DSA-5391-1","MGASA-2023-0157","OPENSUSE-SU-2024:12877-1","RHSA-2023:4349","RHSA-2023:4529","RHSA-2024:0413","SUSE-SU-2023:2048-1","SUSE-SU-2023:2053-1","SUSE-SU-2023:2054-1","SUSE-SU-2023:3665-1","USN-6028-1"],"duplicates":[],"related":["OPENSUSE-SU-2024:12877-1","SUSE-SU-2023:2048-1","SUSE-SU-2023:2053-1","SUSE-SU-2023:2054-1","SUSE-SU-2023:3665-1","USN-6028-1"]},"timeline":[{"kind":"published","date":"2023-04-24T00:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-14T22:54:53.775Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":36,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T12:34:15.311Z","stale":false,"partial":false}}