# Wine 11.20 development release adds ARM64EC and XML improvements

> **Key takeaway:** The Wine 11.20 development release 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-adds-arm64ec-and-xml-improveme.html 

## Summary
The Wine 11.20 development release is now available, providing updates for running Windows applications on Linux and SteamOS. Key changes include improved XML validation, new debugging capabilities for ARM64EC, and a reorganization of CDROM handling. The update also addresses numerous bug fixes for specific software like QuickBooks, Office 2013, 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 long quoted `/c` command lines.
- Resolved issues with **msxml6.dll** loading and encoding in Office 2013 installers.
- Fixed crashes in **ARM64** environments related to DLL functions ending with `noreturn` throw helpers.

## Why it matters
As a core component of Valve's Proton, these improvements directly affect the compatibility of Windows games and applications on Steam Deck and SteamOS.