{"schemaVersion":3,"id":"USN-7974-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"libxml2 vulnerabilities\n\nIt was discovered that libxml2 incorrectly handled maliciously crafted SGML\ncatalog files. An attacker could possibly use this issue to cause libxml2\nto consume excessive resources, leading to a denial of service.\n(CVE-2025-8732)\n\nIt was discovered that libxml2 incorrectly handled recursive include\ndirectories with the RelaxNG parser. An attacker could possibly use this\nissue to cause libxml2 to consume excessive resources, leading to a denial\nof service. (CVE-2026-0989)\n\nNick Wellnhofer discovered that libxml2 incorrectly parsed catalogs with\nself-referencing URI delegates. An attacker could possibly use this issue\nto cause libxml2 to consume excessive resources, leading to a denial of\nservice. (CVE-2026-0990)\n\nNick Wellnhofer discovered that libxml2 inefficiently parsed catalogs\nlinked with repeating nextCatalog elements. An attacker could possibly use\nthis issue to cause libxml2 to use excessive resources, leading to a denial\nof service. (CVE-2026-0992)","dates":{"published":"2026-01-22T13:23:49.000Z","modified":"2026-06-25T13:32:31.970Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"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":[],"exploitCount":0,"weaknesses":[],"affected":[{"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+esm11","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.3+dfsg1-1ubuntu0.7+esm12","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.4+dfsg1-6.1ubuntu1.9+esm7","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.10+dfsg-5ubuntu0.20.04.10+esm4","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.13+dfsg-1ubuntu0.11","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.14+dfsg-1.3ubuntu3.7","noFixRecorded":false,"fixedIn":null},{"text":"< 2.14.5+dfsg-0.2ubuntu0.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.9.1+dfsg1-3ubuntu4.13+esm11 | < 2.9.3+dfsg1-1ubuntu0.7+esm12 | < 2.9.4+dfsg1-6.1ubuntu1.9+esm7 | < 2.9.10+dfsg-5ubuntu0.20.04.10+esm4 | < 2.9.13+dfsg-1ubuntu0.11 | < 2.9.14+dfsg-1.3ubuntu3.7 | < 2.14.5+dfsg-0.2ubuntu0.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-7974-1","label":"ubuntu.com/security/notices/USN-7974-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-8732","label":"ubuntu.com/security/CVE-2025-8732","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-0989","label":"ubuntu.com/security/CVE-2026-0989","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-0990","label":"ubuntu.com/security/CVE-2026-0990","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-0992","label":"ubuntu.com/security/CVE-2026-0992","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2025-8732","CVE-2026-0989","CVE-2026-0990","CVE-2026-0992"]},"timeline":[{"kind":"published","date":"2026-01-22T13:23:49.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-25T13:32:31.970Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T05:55:05.935Z","stale":false,"partial":false}}