[Problem/Bug]: Access violation reading location (Microsoft.Web.WebView2.Core.dll)

[elibroftw]

What happened?

Exception thrown at 0x00007FF9F8FC4058 in Obscura VPN.exe: 0xC0000005: Access violation reading location 0x00007DF5EF1C0000.

Exception thrown at 0x00007FF9F48E2CC4 in Obscura VPN.exe: Microsoft C++ exception: winrt::hresult_error at memory location 0x00000076CB57D540.

Stack

 	[winrt::hresult_error thrown]	
 	[External Code]	
 	Microsoft.Web.WebView2.Core.dll!00007ff8f7415dbc()	Unknown
 	Microsoft.Web.WebView2.Core.dll!00007ff8f7387acc()	Unknown
 	Microsoft.Web.WebView2.Core.dll!00007ff8f741a284()	Unknown
 	Microsoft.Web.WebView2.Core.dll!00007ff8f73fb3e8()	Unknown
 	EmbeddedBrowserWebView.dll!base::internal::Invoker<base::internal::FunctorTraits<`lambda at ..\..\edge_embedded_browser\client\win\current\embedded_browser_webview_environment.cc:1719:11' &&,ICoreWebView2CreateCoreWebView2CompositionControllerCompletedHandler *>,base::internal::BindState<0,0,0,`lambda at ..\..\edge_embedded_browser\client\win\current\embedded_browser_webview_environment.cc:1719:11',Microsoft::WRL::ComPtr<ICoreWebView2CreateCoreWebView2CompositionControllerCompletedHandler>>,void (long, embedded_browser_webview_current::Controller *)>::RunOnce()	Unknown
 	EmbeddedBrowserWebView.dll!embedded_browser_webview_current::internal::EBWebViewEnvironment::RetryCreateWebView()	Unknown
 	EmbeddedBrowserWebView.dll!base::internal::Invoker<base::internal::FunctorTraits<void (embedded_browser_webview_current::internal::EBWebViewEnvironment::*&&)(Microsoft::WRL::ComPtr<embedded_browser_webview_current::Controller>, std::__Cr::unique_ptr<embedded_browser_webview_current::WebViewCreationParams,std::__Cr::default_delete<embedded_browser_webview_current::WebViewCreationParams>>),embedded_browser_webview_current::internal::EBWebViewEnvironment *,embedded_browser_webview_current::Controller *>,base::internal::BindState<1,1,0,void (embedded_browser_webview_current::internal::EBWebViewEnvironment::*)(Microsoft::WRL::ComPtr<embedded_browser_webview_current::Controller>, std::__Cr::unique_ptr<embedded_browser_webview_current::WebViewCreationParams,std::__Cr::default_delete<embedded_browser_webview_current::WebViewCreationParams>>),base::internal::RetainedRefWrapper<embedded_browser_webview_current::internal::EBWebViewEnvironment>,Microsoft::WRL::ComPtr<embedded_browser_webview_current::Controller>>,void (std::__Cr::unique_ptr<embedded_browser_webview_current::WebViewCreationParams,std::__Cr::default_delete<embedded_browser_webview_current::WebViewCreationParams>>)>::RunOnce()	Unknown
 	EmbeddedBrowserWebView.dll!base::OnceCallback<void (std::__Cr::unique_ptr<embedded_browser_webview_current::WebViewCreationParams,std::__Cr::default_delete<embedded_browser_webview_current::WebViewCreationParams>>)>::Run()	Unknown
 	EmbeddedBrowserWebView.dll!embedded_browser_webview_current::EmbeddedBrowserWebView::CloseInternal(long,bool,enum embedded_browser_webview::WebViewCloseReason)	Unknown
 	EmbeddedBrowserWebView.dll!base::TaskAnnotator::RunTaskImpl(struct base::PendingTask &)	Unknown
 	EmbeddedBrowserWebView.dll!base::TaskAnnotator::RunTask<>()	Unknown
 	EmbeddedBrowserWebView.dll!embedded_browser_webview::internal::AppTaskRunner::DoWork(void)	Unknown
 	EmbeddedBrowserWebView.dll!embedded_browser_webview::internal::AppTaskRunner::MessageCallback()	Unknown
 	EmbeddedBrowserWebView.dll!base::RepeatingCallback<bool (unsigned int, unsigned long long, long long, long long *)>::Run()	Unknown
 	EmbeddedBrowserWebView.dll!base::win::MessageWindow::WindowProc()	Unknown
 	EmbeddedBrowserWebView.dll!base::win::WrappedWindowProc<&base::win::MessageWindow::WindowProc>()	Unknown
 	user32.dll!UserCallWinProcCheckWow(struct _ACTIVATION_CONTEXT *,__int64 (*)(struct tagWND *,unsigned int,unsigned __int64,__int64),struct HWND__ *,enum _WM_VALUE,unsigned __int64,__int64,void *,int)	Unknown
 	user32.dll!DispatchMessageWorker()	Unknown
 	[Inline Frame] Microsoft.ui.xaml.dll!DirectUI::FrameworkApplication::RunDesktopWindowMessageLoop() Line 1334	C++
 	[Inline Frame] Microsoft.ui.xaml.dll!DirectUI::FrameworkApplication::StartDesktop() Line 235	C++
 	[Inline Frame] Microsoft.ui.xaml.dll!DirectUI::FrameworkApplicationFactory::StartImpl(ABI::Microsoft::UI::Xaml::IApplicationInitializationCallback *) Line 182	C++
 	Microsoft.ui.xaml.dll!DirectUI::FrameworkApplicationFactory::Start(ABI::Microsoft::UI::Xaml::IApplicationInitializationCallback * pCallback) Line 843	C++
 	[External Code]	
 	[Inline Frame] hostpolicy.dll!coreclr_t::execute_assembly(int) Line 108	C++
>	[Inline Frame] hostpolicy.dll!run_app_for_context(const hostpolicy_context_t &) Line 250	C++
 	hostpolicy.dll!run_app(const int argc, const wchar_t * * argv) Line 285	C++
 	hostpolicy.dll!corehost_main(const int argc, const wchar_t * * argv) Line 426	C++
 	[Inline Frame] hostfxr.dll!execute_app(const std::wstring &) Line 146	C++
 	[Inline Frame] hostfxr.dll!?A0x36711b34::read_config_and_execute(const std::wstring &) Line 533	C++
 	hostfxr.dll!fx_muxer_t::handle_exec_host_command(const std::wstring & host_command, const host_startup_info_t & host_info, const std::wstring & app_candidate, const std::unordered_map<enum known_options,std::vector<std::wstring,std::allocator<std::wstring>>,known_options_hash,std::equal_to<enum known_options>,std::allocator<std::pair<enum known_options const ,std::vector<std::wstring,std::allocator<std::wstring>>>>> & opts, int argc, const wchar_t * * argv, int argoff, host_mode_t mode, const bool is_sdk_command, wchar_t * result_buffer, int buffer_size, int * required_buffer_size) Line 1008	C++
 	hostfxr.dll!fx_muxer_t::execute(const std::wstring host_command, const int argc, const wchar_t * * argv, const host_startup_info_t & host_info, wchar_t * result_buffer, int buffer_size, int * required_buffer_size) Line 579	C++
 	hostfxr.dll!hostfxr_main_startupinfo(const int argc, const wchar_t * * argv, const wchar_t * host_path, const wchar_t * dotnet_root, const wchar_t * app_path) Line 63	C++
 	Obscura VPN.exe!exe_start(const int argc, const wchar_t * * argv) Line 269	C++
 	Obscura VPN.exe!wmain(const int argc, const wchar_t * * argv) Line 332	C++
 	[External Code]	

// Execute the application
unsigned int exit_code;
auto hr = context.coreclr->execute_assembly(
    (int32_t)argv_local.size(),
    argv_local.data(),
    managed_app.data(),
    &exit_code);

Importance

Blocking. My app's basic functions are not working due to this issue.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

No response

SDK Version

No response

Framework

WinUI3/WinAppSDK

Operating System

Windows 11

OS Version

No response

Repro steps

No idea

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

Regression in newer Runtime

Last working version (if regression)

Friday May 16th 😭

[elibroftw]

nvm

[elibroftw]

Exception 1

onecoreuap\windows\moderncore\inputv2\components\attachableinputobject\lifted\coreinputobjects\client\inputnonclientpointersourcewinrt.cpp(1763)\Microsoft.UI.Input.dll!00007FF8AE6BBB74: (caller: 00007FF81E3FBCA8) ReturnHr(1) tid(aa88) 80070057 The parameter is incorrect.
    Msg:[There is no HWND associated with the provided WindowId.] 
Exception thrown at 0x00007FF9F48E2CC4 (KernelBase.dll) in Obscura VPN.exe: WinRT originate error - 0x80070057 : 'The parameter is incorrect.'.
Exception thrown at 0x00007FF9F48E2CC4 in Obscura VPN.exe: Microsoft C++ exception: winrt::hresult_invalid_argument at memory location 0x000000B19D17C5A0.
onecoreuap\windows\moderncore\inputv2\components\attachableinputobject\lifted\coreinputobjects\client\inputnonclientpointersourcewinrt.cpp(1763)\Microsoft.UI.Input.dll!00007FF8AE6BBB74: (caller: 00007FF81E3FBCA8) ReturnHr(2) tid(aa88) 80070057 The parameter is incorrect.
    Msg:[There is no HWND associated with the provided WindowId.] 
Exception thrown at 0x00007FF9F48E2CC4 (KernelBase.dll) in Obscura VPN.exe: WinRT originate error - 0x80070057 : 'The parameter is incorrect.'.
Exception thrown at 0x00007FF9F48E2CC4 in Obscura VPN.exe: Microsoft C++ exception: winrt::hresult_invalid_argument at memory location 0x000000B19D17C640.
Webview: {"date":"2026-05-19T17:42:41.0904841-04:00","level":"INFO","appname":"Obscura VPN","logger":"Webview","thread":"2","ndc":"(null)","message":"invoked FFI command getStatus"}
Obscura_Client.InvokeCommand: {"date":"2026-05-19T17:42:41.1580898-04:00","level":"WARN","appname":"Obscura VPN","logger":"Obscura_Client.InvokeCommand","thread":"2","ndc":"(null)","message":"Unknown command: {\"checkForUpdates\":{}}"}
Exception thrown: 'System.NotSupportedException' in Obscura VPN.dll
Exception thrown at 0x00007FF821AB04DC (Microsoft.Web.WebView2.Core.dll) in Obscura VPN.exe: 0xC0000005: Access violation reading location 0x0000000000000000.

---

Exception 2

pal::hresult_t coreclr_t::execute_assembly(
    int argc,
    const char** argv,
    const char* managed_assembly_path,
    unsigned int* exit_code)
{
    assert(coreclr_contract.coreclr_execute_assembly != nullptr);

    return coreclr_contract.coreclr_execute_assembly(
        _host_handle,
        _domain_id,
        argc,
        argv,
        managed_assembly_path,
        exit_code);
}

Exception thrown at 0x00007FF82D82488C (Microsoft.Web.WebView2.Core.dll) in Obscura VPN.exe: 0x80000002: Datatype misalignment.
Exception thrown at 0x00007FF9F48E2CC4 (KernelBase.dll) in Obscura VPN.exe: 0x80000002: Datatype misalignment.
Unhandled exception at 0x00007FF9F48E2CC4 (KernelBase.dll) in Obscura VPN.exe: 0x80000002: Datatype misalignment.