[GSOD]SYSTEM_SERVICE_EXCEPTION in win32kfull!SetMagnificationInputTransform when a process exits

I can confirm an apparently identical crash on 24 August 2026.

Environment:

• Windows build: 26340.9233
• ChatGPT package: OpenAI.Codex 26.818.5229.0
• Process: codex-command-runner-0.149.0-alpha.4.1.exe
• Bugcheck: SYSTEM_SERVICE_EXCEPTION (0x3B)
• Exception: 0xC0000005
• Faulting module: win32kfull.sys
• Faulting RVA: win32kfull.sys+0x23c941

The faulting RVA matches the reported win32kfull!SetMagnificationInputTransform+0x39 location. The captured kernel stack likewise contains win32kfull.sys, win32kbase.sys and win32k.sys addresses.

The crash occurred while using ChatGPT Work locally to inspect C:\Windows\Temp. The Codex command runner was the current process when Windows bugchecked. After reboot, the ChatGPT desktop app opened to a blank, unresponsive window.

Minidump SHA-256:

c261cef0ef12784e0d3a766c0c9ed9386179a01f802f62557d9574168b237cc0

I will not attach the minidump publicly because inspection confirms that it contains local paths, configuration and fragments of user-process memory. I can provide it privately through Feedback Hub or another appropriate Microsoft diagnostic channel.