{"id":"MGASA-2026-0459","summary":"Updated libxml2 packages fix security vulnerabilities","details":"The 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)\n","modified":"2026-09-28T17:15:03.661029458Z","published":"2026-09-28T17:04:04Z","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"],"references":[{"type":"ADVISORY","url":"https://advisories.mageia.org/MGASA-2026-0459.html"},{"type":"REPORT","url":"https://bugs.mageia.org/show_bug.cgi?id=35932"},{"type":"WEB","url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/message/ZWJ6JIPH33FSDSBTGTTXHQQKFJEXIKRU/"},{"type":"WEB","url":"https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1124"},{"type":"WEB","url":"https://www.openwall.com/lists/oss-security/2026/09/04/5"},{"type":"WEB","url":"https://www.openwall.com/lists/oss-security/2026/09/05/4"}],"affected":[{"package":{"name":"libxml2","ecosystem":"Mageia:10","purl":"pkg:rpm/mageia/libxml2?arch=source&distro=mageia-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.15.1-3.2.mga10"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2026-0459.json"}}],"schema_version":"1.9.0","credits":[{"name":"Mageia","contact":["https://wiki.mageia.org/en/Packages_Security_Team"],"type":"COORDINATOR"}]}