Issues

• SOS.Tests.DiagnosticCommandTests.DumpGcData_ReportsPinningAfterCollection test failing in main in the runtime-diagnostics pipeline

  area-System.DiagnosticsKnown Build Erroruntriaged
  dotnet/runtime#136324 · Filter by author jkoritzinsky opened on Oct 22, 2026
  2

• Add a stable load-context id to the CoreCLR loader and binder events

  area-AssemblyLoaderuntriaged
  dotnet/runtime#136322 · Filter by author pcshrosbree opened on Oct 22, 2026
  1

• [API Proposal]: Add ClaimsPrincipal.HasAuthenticatedIdentity

  api-suggestionarea-System.Securityuntriaged
  dotnet/runtime#136320 · Filter by author halter73 opened on Oct 22, 2026
  1

• [WASM][AOT] Vector.GreaterThan(Vector<float>) masks added as floats with SIMD: wrong result, and LLVMTypeOf assertion when compared

  area-System.Numericsuntriaged
  dotnet/runtime#136319 · Filter by author MoDDem opened on Oct 22, 2026
  1

• Tracking: Move main Linux build hosts to Azure Linux 4

  area-Infrastructureuntriaged
  dotnet/runtime#136318 · Filter by author richlander opened on Oct 22, 2026
  1

• [x86] .NET 10.0.13: access violation in GetTLSIndexForThreadStatic (Internal CLR error 0x80131506), regression from #129785

  area-VM-coreclruntriaged
  dotnet/runtime#136317 · Filter by author danilobreda opened on Oct 22, 2026
  1

• Windows: legacy PKCS#12 export can return trailing bytes beyond the encoded PFX

  area-System.Security
  Bug

  dotnet/runtime#136316 · Filter by author ashakhatri007 opened on Oct 22, 2026 · 10.0.x
  4

  

• ZipArchive Update: changing the attributes of a 7-Zip ZipCrypto entry makes its password stop working

  area-System.IO.Compressionuntriaged
  dotnet/runtime#136314 · Filter by author pawlos opened on Oct 22, 2026
  1

• Tracking: Migrate Ubuntu 22.04/24.04 infrastructure on main to Azure Linux 4 or Ubuntu 26.04

  area-Infrastructureuntriaged
  dotnet/runtime#136313 · Filter by author richlander opened on Oct 22, 2026
  2

• Obsolete Global Mutexes

  area-System.Threading
  dotnet/runtime#136312 · Filter by author 333fred opened on Oct 22, 2026 · 12.0.0
  2

• JIT: (bug) wrong result when (m & Vector128.Create(a)) == <zero with side effects> is folded to vptest with a stale memory operand

  area-CodeGen-coreclr
  dotnet/runtime#136306 · Filter by author EgorBo opened on Oct 22, 2026 · 12.0.0
  1

• JIT: (bug) wrong code for Vector128.GetElement when the index expression modifies the vector's memory

  area-CodeGen-coreclr
  dotnet/runtime#136305 · Filter by author EgorBo opened on Oct 22, 2026 · 12.0.0
  1

• JIT: (bug) Crash: Vector512.ConditionalSelect over Avx512F.Add with a non-constant FloatRoundingMode

  area-CodeGen-coreclr
  dotnet/runtime#136304 · Filter by author EgorBo opened on Oct 22, 2026 · 12.0.0
  1

• JIT: (bug) X86Base.DivRem is removed when its result is unused, so the DivideByZeroException is lost

  area-CodeGen-coreclr
  dotnet/runtime#136303 · Filter by author EgorBo opened on Oct 22, 2026 · 12.0.0
  1

• NativeAOT: missed devirtualization for isinst

  area-CodeGen-coreclr
  dotnet/runtime#136302 · Filter by author EgorBo opened on Oct 22, 2026 · Future
  2

• [API Proposal]: Allow changing ZstandardEncoder compression quality without recreating the encoder

  api-suggestionarea-System.IO.Compressionuntriaged
  dotnet/runtime#136294 · Filter by author koculu opened on Oct 22, 2026
  2

• HttpListener on Unix: GetContextAsync()/BeginGetContext() racing with Close() never completes

  area-System.Netuntriaged
  dotnet/runtime#136293 · Filter by author martincostello opened on Oct 22, 2026
  1

• NullReferenceException in HttpConnectionPool.HandleAltSvc when a response has an empty Alt-Svc header (regression in .NET 10)

  area-System.Net.Http
  dotnet/runtime#136291 · Filter by author Tomius opened on Oct 22, 2026 · 12.0.0
  1

  

• [macOS/Rosetta] .NET 12 x64 console startup intermittently hangs in translation cache; private template mappings avoid it

  area-VM-coreclros-macosuntriaged
  dotnet/runtime#136288 · Filter by author rolfbjarne opened on Oct 22, 2026
  2

• CoreCLR browser-Wasm trimmed builds stage mismatched PDBs, breaking in-memory stack traces

  area-Infrastructureuntriaged
  dotnet/runtime#136286 · Filter by author radekdoulik opened on Oct 22, 2026
  1

• [ci-scan] Hang: Microsoft.Extensions.FileProviders.Physical.Tests.PhysicalFilesWatcherTests.CreateFileChangeToken_FiresOnlyWhenFileIsCreated_WithMultipleMissingDirectories

  area-Extensions-FileSystemblocking-clean-ciKnown Build Error
  dotnet/runtime#136285 · Filter by author eiriktsarpalis opened on Oct 22, 2026
  1

• [mono] Native memory leak on the first invoke of every open-instance delegate to a virtual method

  area-VM-meta-monountriaged
  dotnet/runtime#136284 · Filter by author timbearcity opened on Oct 22, 2026

• Remove UseOptimizedPublish=false from trimming tests after updating to the .NET 11 GA SDK

  area-Infrastructure-librariesuntriaged
  dotnet/runtime#136283 · Filter by author akoeplinger opened on Oct 22, 2026
  2

• Several MemoryExtensions.LastIndexOfAnyExcept overloads incorrectly document "first occurrence"

  area-System.Memoryuntriaged
  dotnet/runtime#136282 · Filter by author ivanvoyager opened on Oct 22, 2026
  1

• MemoryExtensions.LastIndexOf ignores a custom comparer for bitwise-equatable element types

  area-System.Runtimeuntriaged
  dotnet/runtime#136281 · Filter by author ivanvoyager opened on Oct 22, 2026
  2