USN-8560-1: libXfont vulnerabilities

It was discovered that libXfont incorrectly handled scaling bitmap fonts, leading to a heap buffer overflow. An attacker able to access the X server could use this issue to cause libXfont to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-56001) It was discovered that libXfont did not properly check glyph bounds when reading PCF fonts, leading to a heap buffer overflow.