USN-8910-1: libxml2 vulnerabilities

Yirou Yang discovered that libxml2 incorrectly handled certain XML catalogs. If a user or automated system was tricked into processing a specially crafted XML catalog, an attacker could possibly use this issue to cause libxml2 to crash, resulting in a denial of service. (CVE-2026-76781) It was discovered that libxml2 incorrectly handled certain large qualified names, leading to a heap-based buffer overflow.