# Wine 11.20 development release improves ARM64EC and XML validation

> **Key takeaway:** Wine 11.20 introduces relay debugging for ARM64EC and moves CDROM support to the Mount Manager.

**Published:** 2026-10-17T07:09:09+00:00 
**Source:** GamingOnLinux (Steam, Proton & Deck) 
**Category:** open-gaming 
**Canonical URL:** https://fosswire.org/news/wine-1120-development-release-improves-arm64ec-and-xml-valid.html 

## Summary
The Wine 11.20 development release focuses on enhancing compatibility for Windows applications on Linux and SteamOS. Key updates include improved XML validation, new debugging capabilities for ARM64EC, and architectural changes to how CDROMs are handled. The release also addresses numerous bug fixes for specific software like QuickBooks, SumatraPDF, and various games.

## Technical updates in Wine 11.20
- Added **relay debugging** support for **ARM64EC**.
- Improved **XML validation** processes.
- Relocated **CDROM support** to the **Mount Manager**.
- Fixed a **stack buffer overflow** in `cmd`'s `search_command` when handling quoted `/c` commands exceeding `MAX_PATH`.
- Resolved issues with **msxml6.dll** loading and **cldapi.dll** implementation affecting OneDrive.

## Why it matters
As a core component of Valve's Proton, these improvements directly enhance the ability to run Windows software and games on Steam Deck and other Linux-based gaming platforms.