{"schemaVersion":3,"id":"MGASA-2026-0459","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Updated libxml2 packages fix security vulnerabilities\n\nThe updated packages fix several security issues:\nStack-Based Buffer Overflow in libxml2. (CVE-2026-11979)\nIn libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds\nread, aka an out-of-bounds read in the NXT macro in xmlregexp.\n(CVE-2026-86137)\nIn libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer\noverflow and resultant heap-based buffer overflow. (CVE-2026-86138)\nIn libxml2 before 2.15.4, xmlURIEscapeStr in uri.c has an integer\noverflow. (CVE-2026-86139)\nIn libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat\nstack-based buffer overflow. (CVE-2026-86140)\nxmlregexp in libxml2 before 2.15.4 has a NULL pointer dereference in\nxmlRegNewParserCtxt after a strdup failure, i.e., it does not calculate\na string length after NULL checking. (CVE-2026-86141)\nIn libxml2 before 2.15.4, there is a heap-based buffer overflow in\nxmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.\n(CVE-2026-86142)\nIn xmlIO in libxml2 before 2.15.4, an inconsistency in\nxmlOutputWriteCallback and xmlBufUse causes negative lengths to reach\nwrite callbacks, aka a lack of a check for integer overflow before\ncalling writecallback. This has security relevance for many types of\nuses of that length value within a callback. (CVE-2026-86143)\nIn xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and\nxmlXIncludeProcessTree do not propagate parseFlags. This has security\nrelevance for, for example, the XML_PARSE_NONET flag, if (without it) a\ncustom resource loader accesses the internet and triggers XML external\nentity injection, SSRF, or a denial of service (e.g., for an\nattacker-controlled internet resource that is intentionally slow).\n(CVE-2026-86144)","dates":{"published":"2026-09-28T17:04:04.000Z","modified":"2026-09-28T17:15:03.661Z","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":"mageia","product":"libxml2","name":"libxml2","label":"libxml2","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/libxml2","purlType":"rpm","versions":[{"text":"< 2.15.1-3.2.mga10","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.15.1-3.2.mga10","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://advisories.mageia.org/MGASA-2026-0459.html","label":"advisories.mageia.org/MGASA-2026-0459.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=35932","label":"bugs.mageia.org/show_bug.cgi?id=35932","hostname":"bugs.mageia.org","tags":["REPORT"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/message/ZWJ6JIPH33FSDSBTGTTXHQQKFJEXIKRU/","label":"lists.opensuse.org/archives/…","hostname":"lists.opensuse.org","tags":["WEB"]},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1124","label":"gitlab.gnome.org/GNOME/libxml2/-/work_items/1124","hostname":"gitlab.gnome.org","tags":["WEB"]},{"url":"https://www.openwall.com/lists/oss-security/2026/09/04/5","label":"www.openwall.com/lists/oss-security/2026/09/04/5","hostname":"www.openwall.com","tags":["WEB"]},{"url":"https://www.openwall.com/lists/oss-security/2026/09/05/4","label":"www.openwall.com/lists/oss-security/2026/09/05/4","hostname":"www.openwall.com","tags":["WEB"]}],"lineage":{"upstream":["CVE-2026-11979","CVE-2026-86137","CVE-2026-86138","CVE-2026-86139","CVE-2026-86140","CVE-2026-86141","CVE-2026-86142","CVE-2026-86143","CVE-2026-86144"],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-28T17:04:04.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-28T17:15:03.661Z","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":"2026-10-20T08:32:26.443Z","stale":false,"partial":false}}