Issues

• ReadyToRun: StaticVirtualMethods and InternalMethodImpl Loader tests fail since #135802

  area-ReadyToRunblocking-clean-ci-optionaluntriaged
  dotnet/runtime#136494 · Filter by author caraioniurie47 opened on Oct 26, 2026
  3

• [browser][MT] getNewWorker never finds a loaded worker after the Emscripten 5.0.6 upgrade (worker.loaded no longer set); first Task.Delay/timer deadlocks JS→.NET dispatch on 11.0 rc.3

  area-System.Threadinguntriaged
  dotnet/runtime#136492 · Filter by author SimonCropp opened on Oct 26, 2026
  1

• GCRestartEEEnd is fired after ResumeAllThreads wakes managed threads, inflating reported EE pause durations by tens of milliseconds under CPU load

  area-VM-coreclruntriaged
  dotnet/runtime#136490 · Filter by author VSadov opened on Oct 26, 2026
  1

  

• [browser][wasm] Backport #132306 (GC pin for OP_MOVE destinations in AOT code) to release/10.0

  area-CodeGen-coreclruntriaged
  dotnet/runtime#136489 · Filter by author doverhill opened on Oct 26, 2026
  1

• [Mono] GetFunctionPointer throws for an abstract method on the JIT; CoreCLR and the interpreter return a pointer

  area-Interop-monountriaged
  dotnet/runtime#136484 · Filter by author caraioniurie47 opened on Oct 26, 2026

• [Mono] CreateDelegate binds a delegate to a static abstract interface method; calling it throws BadImageFormatException

  area-System.Reflectionuntriaged
  dotnet/runtime#136482 · Filter by author caraioniurie47 opened on Oct 26, 2026
  1

• JIT: optimized [ThreadStatic] access can run a static constructor the JIT doesn't know about (stale reads after it)

  area-VM-coreclr
  dotnet/runtime#136480 · Filter by author EgorBo opened on Oct 26, 2026 · 12.0.0
  3

• InvalidOperationException "Handle is not initialized." on a .NET TP Worker, thrown from ThreadPoolTypedWorkItemQueue.Execute (IOCP completion path), .NET 10 on Wine

  area-System.Threadingtracking-external-issueuntriaged
  dotnet/runtime#136479 · Filter by author DragonGitz opened on Oct 26, 2026
  2

• [iOS] CoreCLR: a GC during the first call through an interpreted instantiating stub leaves the callee a stale this

  area-CodeGen-Interpreter-coreclr
  dotnet/runtime#136472 · Filter by author christallire opened on Oct 26, 2026 · 12.0.0
  4

  

• [Breaking change proposal] Make Process.Run* kill the entire process tree on timeout or cancellation

  area-System.Diagnostics.Process
  dotnet/runtime#136466 · Filter by author adamsitnik opened on Oct 26, 2026 · 12.0.0
  2

• [API Proposal]: Generator-facing JSExport registration and function-pointer binding

  api-ready-for-reviewapi-suggestionarea-System.Runtime.InteropServices.JavaScriptos-browser
  dotnet/runtime#136464 · Filter by author pavelsavara opened on Oct 26, 2026 · 12.0.0
  2

  

• [ARM64 Linux] Excluding the vDSO prevents createdump JSON reports from resolving the native C++ crash frame

  area-Diagnostics-coreclruntriaged
  dotnet/runtime#136458 · Filter by author GLTD12860-Oribe opened on Oct 26, 2026
  1

• [Android] SslStream on Android 9 (API 28) fails with ArgumentException "SSL_NULL_WITH_NULL_NULL" since .NET 11 Preview 4 — is this expected?

  area-System.Net.Securityos-android
  dotnet/runtime#136456 · Filter by author YukiNuno12 opened on Oct 25, 2026 · 12.0.0
  3

• DynamicMethod with a function pointer parameter, return type or local throws NotSupportedException on .NET 11

  area-System.Reflection.Emituntriaged
  dotnet/runtime#136453 · Filter by author caraioniurie47 opened on Oct 25, 2026
  1

• DispatchProxy: calling a method with a non-null pointer argument throws NullReferenceException

  area-Interop-coreclruntriaged
  dotnet/runtime#136451 · Filter by author caraioniurie47 opened on Oct 25, 2026
  1

• TypeBuilder (AssemblyBuilderAccess.Run) throws NotSupportedException for signatures that contain modified types

  area-System.Reflectionuntriaged
  dotnet/runtime#136449 · Filter by author caraioniurie47 opened on Oct 25, 2026
  1

• [mono] Taking the address of an [UnmanagedCallersOnly] method that returns a function pointer aborts the process ("return type 0x1b unknown")

  area-Interop-monountriaged
  dotnet/runtime#136448 · Filter by author caraioniurie47 opened on Oct 25, 2026

• Microsoft Security Advisory CVE-2026-111497 | .NET Brotli Decoder Out-of-bounds Write Vulnerability

  area-MetaSecurity
  dotnet/runtime#136446 · Filter by author bribrothers opened on Oct 25, 2026
  1

• Microsoft Security Advisory CVE-2026-70197 | .NET and Visual Studio Remote Code Execution Vulnerability | October 25, 2026 OOB update

  area-MetaSecurityuntriaged
  dotnet/runtime#136445 · Filter by author bribrothers opened on Oct 25, 2026
  1

• macOS SslStream (UseNetworkFramework): NullReferenceException in SafeDeleteNwContext write-completion callback after Dispose aborts the process when the peer closes during writes

  area-System.Net.Security
  Bug

  dotnet/runtime#136439 · Filter by author avram opened on Oct 25, 2026 · 12.0.0
  1

• Channel.CreateUnbounded(SingleReader = true): Reader.Completion can stay pending forever when the last TryRead races TryComplete

  area-System.Threadinguntriaged
  dotnet/runtime#136437 · Filter by author alexsorokoletov opened on Oct 25, 2026
  1

• [API Proposal]: Bounded-nonnegative ArgumentOutOfRangeException throw helpers

  api-suggestionarea-System.Runtimeuntriaged
  dotnet/runtime#136434 · Filter by author spannerisms opened on Oct 25, 2026
  4

• GetILFunctionBody fails with COR_E_BADIMAGEFORMAT for a method edited by Hot Reload (regression in .NET 11)

  area-Diagnostics-coreclruntriaged
  dotnet/runtime#136432 · Filter by author pcshrosbree opened on Oct 25, 2026
  1

• GC.AddMemoryPressure ends an active NoGC region on NativeAOT (but not on CoreCLR)

  area-GC-coreclruntriaged
  dotnet/runtime#136426 · Filter by author Dev-Taehui opened on Oct 24, 2026
  4

• Does CVE-2026-111497 affect System.IO.Compression.Brotli in .NET 9 and 10?

  area-System.IO.CompressionSecurityuntriaged
  dotnet/runtime#136422 · Filter by author Steveiwonder opened on Oct 24, 2026
  7