https://www.bleepingcomputer.com/news/microsoft/microsoft-releases-emergency-updates-to-fix-xps-display-issues/

Microsoft has released out-of-band (OOB) updates for some .NET Framework and .NET versions to address XPS display issues triggered by December 2022 cumulative security updates.

Users will experience null reference exceptions and images or glyphs displaying incorrectly when viewing XPS documents rendered using affected Windows Presentation Foundation (WPF) based apps.