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In libxml2 before 2.13.8 and 2.14.x before 2.14.2, xmlSchemaIDCFillNodeTables in xmlschemas.c has a heap-based buffer under-read. To exploit this, a crafted XML document must be validated against an XML schema with certain identity constraints, or a crafted XML schema must be used.
Reserved 2025-04-08 | Published 2025-04-17 | Updated 2025-04-17 | Assigner mitreCWE-1284 Improper Validation of Specified Quantity in Input
gitlab.gnome.org/GNOME/libxml2/-/issues/890
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