Issues

• [dnceng-bot] Branch runtime/release/9.0 can't be merged to Azdo internal branch

  area-Infrastructureuntriaged
  dotnet/runtime#135930 · Filter by author dotnet-mirroring opened on Oct 16, 2026
  1

• [API Proposal]: SP 800-56C one-step KDF over a caller-supplied shared secret

  area-System.Securityuntriaged
  dotnet/runtime#135926 · Filter by author kirill-abblix opened on Oct 16, 2026
  1

• JIT (x64, .NET 10): Vector128.CreateScalar(x).As<double, ulong>().ToScalar() returns garbage (backport of #129644?)

  area-CodeGen-coreclruntriaged
  dotnet/runtime#135923 · Filter by author snmsts opened on Oct 16, 2026
  1

• [NativeAOT][RuntimeAsync] NullReferenceException awaiting Task<ValueTask> / Task<ValueTask<T>>

  area-System.Threading.Tasksruntime-asyncuntriaged
  dotnet/runtime#135922 · Filter by author yushun-zhou opened on Oct 16, 2026
  1

• ICorDebugILCode::GetEHClauses returns no clauses for a ReJIT IL body with a small-format EH section

  area-CodeGen-coreclruntriaged
  dotnet/runtime#135919 · Filter by author pcshrosbree opened on Oct 16, 2026
  1

• [wasm] Thread abort is raised inside finally and catch handlers of R2R code, so ControlledExecution.Run lets ThreadAbortException escape

  arch-wasmarea-CodeGen-coreclruntriaged
  dotnet/runtime#135914 · Filter by author pcshrosbree opened on Oct 16, 2026
  2

• ILLink strips interfaces of an uninstantiated generic base class while the derived class keeps them, causing TypeLoadException

  area-Tools-ILLink
  dotnet/runtime#135913 · Filter by author Illustar0 opened on Oct 16, 2026 · 10.0.x
  1

  

• NativeAOT linux-x64: GC return-address hijack corrupts the caller's frame when a thread is suspended in the epilogue of a self-recursive fast tail call

  area-NativeAOT-coreclruntriaged
  dotnet/runtime#135912 · Filter by author fubar-coder opened on Oct 16, 2026
  2

• Complex.Tan returns infinities for a finite tangent near π/2

  area-System.Numerics
  dotnet/runtime#135910 · Filter by author vera-rubin opened on Oct 16, 2026 · 12.0.0
  4

  

• ReadyToRun: box T; isinst X is not folded for exact value-type instantiations, so R2R code allocates

  arch-wasmarea-ReadyToRunos-browseros-iosos-maccatalystos-tvosos-wasi
  dotnet/runtime#135892 · Filter by author lewing opened on Oct 15, 2026 · 12.0.0
  9

  

• Test failure: MutexTests IOException "'/tmp/.dotnet/shm/global' does not have the expected owner permissions"

  area-System.IOblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#135889 · Filter by author lewing opened on Oct 15, 2026
  1

• Test failure: System.Threading.Tests.MutexTests.NameOptionsApiCompatibilityTest

  area-System.Threadingblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#135888 · Filter by author lewing opened on Oct 15, 2026
  1

• MutexTests failing on Unix, browser and WASI after #135778 (default named-mutex scope change)

  area-System.Threadinguntriaged
  dotnet/runtime#135887 · Filter by author lewing opened on Oct 15, 2026
  3

  

• release/8.0 is not building due to a MsQuic dependency warning-as-error.

  area-Infrastructure-librariesblocking-clean-ciKnown Build Erroruntriaged
  dotnet/runtime#135879 · Filter by author ViveliDuCh opened on Oct 15, 2026
  1

• LdapConnection.Bind never times out on Linux when the server accepts the connection but does not respond: LDAP_OPT_TIMEOUT is never set

  area-System.DirectoryServicesuntriaged
  dotnet/runtime#135874 · Filter by author xionglingfeng opened on Oct 15, 2026
  1

• LdapConnection.SendRequest does not honour Timeout on 64-bit Linux: LDAP_TIMEVAL is 8 bytes, but libldap reads a 16-byte struct timeval

  area-System.DirectoryServicesuntriaged
  dotnet/runtime#135873 · Filter by author xionglingfeng opened on Oct 15, 2026
  1

• [R2R] Crossgen2 AllMethodsOnType compiles every method on referenced generic instantiations, causing composite size explosion (wasmtime OOM on WASI)

  arch-wasmarea-ReadyToRunos-wasi
  dotnet/runtime#135872 · Filter by author lewing opened on Oct 15, 2026 · 12.0.0
  11

  

• [Interpreter] A thread abort raised again after a catch skips the catch of the enclosing try

  area-CodeGen-Interpreter-coreclruntriaged
  dotnet/runtime#135871 · Filter by author pcshrosbree opened on Oct 15, 2026
  2

• Access violation in UnwindInfoTable::UnpublishUnwindInfoForMethod when a DynamicMethod with a discarded JIT attempt is collected

  area-CodeGen-coreclruntriaged
  dotnet/runtime#135870 · Filter by author mscobe opened on Oct 15, 2026
  1

  

• Drop support for x64 simulators (iossimulator-x64 / tvossimulator-x64)

  arch-x64area-Infrastructureos-iosuntriaged
  dotnet/runtime#135864 · Filter by author rolfbjarne opened on Oct 15, 2026
  3

• HttpContentHeaders.ContentLength throws OBjectDisposedException under certain conditions

  area-System.Net.Httpuntriaged
  dotnet/runtime#135859 · Filter by author lilinus opened on Oct 15, 2026
  3

• [aw] Need to setup a mechanism to periodically upgrade gh-aw version used by the repo

  agentic-workflowsarea-Infrastructureuntriaged
  dotnet/runtime#135856 · Filter by author vitek-karas opened on Oct 15, 2026
  1

• .NET 11 thread pool: multiplexed clients leave cores idle, 30–45% lower throughput than .NET 10 (RC1 and RC2)

  area-System.Threadingtenet-performanceuntriaged
  dotnet/runtime#135855 · Filter by author mgravell opened on Oct 15, 2026
  4

• [tests][Apple] XUnitWrapperGenerator skips conditional bodies for iossimulator TargetOS

  area-CodeGen-coreclruntriaged
  dotnet/runtime#135849 · Filter by author ReneeGA2020 opened on Oct 15, 2026
  1

• [CoreCLR][iOS] Cached interface dispatch uses a retired collectible target after ALC unload

  area-VM-coreclruntriaged
  dotnet/runtime#135848 · Filter by author ReneeGA2020 opened on Oct 15, 2026
  2