10.0.x

Issues

• Blazor WASM AOT Compilation Failure

  arch-wasmarea-Codegen-AOT-monoinvestigateos-browser
  Bug

  dotnet/runtime#132071 · Filter by author ChristopherHaas opened on Aug 9, 2026 · 10.0.x
  10

  

• [Profiler] duplicated ExceptionUnwindFunctionEnter/ExceptionUnwindFunctionLeave callbacks when exception is thrown from try-finally block.

  area-VM-coreclr
  Bug

  dotnet/runtime#123351 · Filter by author alexanderqqq opened on Jan 19, 2026 · 10.0.x
  7

  

• [.NET Core/Linux] X509 chain revocation check uses only first CDP URL, does not fall back to others

  area-System.Securityos-linux
  dotnet/runtime#121253 · Filter by author myaryn opened on Oct 31, 2025 · 10.0.x
  2

• .NET 10 importmap - incompatible with secure Content Security Policy (CSP)

  arch-wasmarea-System.Runtime.InteropServices.JavaScriptneeds-author-actionos-browser
  dotnet/runtime#121885 · Filter by author rodolfograve opened on Nov 21, 2025 · 10.0.x
  8

  

• Parallel Powershell sessions lead to corruption of the StartUpProfileData cache created by ProfileOptimization.StartProfile

  area-VM-coreclr
  dotnet/runtime#121977 · Filter by author daxian-dbw opened on Nov 26, 2025 · 10.0.x
  5

• WasmFingerprintAssets false breaks type/value information in WASM debugging

  arch-wasmarea-Debugger-monoos-browser
  dotnet/runtime#122201 · Filter by author ArcadeMode opened on Dec 4, 2025 · 10.0.x
  7

  

• Blazor WebAssembly debugger: decode_ptr_id assertion at startup, BPs solid-red but never hit — VS2026 18.6.0 + dn10 SDK 10.0.300 (similar to #121738 which is reportedly fixed)

  arch-wasmarea-Debugger-mononeeds-author-actionneeds-further-triageos-browser
  dotnet/runtime#128407 · Filter by author jon001 opened on May 20, 2026 · 10.0.x
  7

• [mono][android-arm64] System.Threading.Volatile.ReadBarrier() never returns (hangs; or StackOverflow/SIGSEGV in deeper call chains)

  area-Codegen-Interpreter-mono
  dotnet/runtime#130265 · Filter by author uholeschak opened on Jul 6, 2026 · 10.0.x
  4

  

• [release/10.0] [mono][wasm] Fix pinvoke with 64-bit enum argument

  area-Interop-monoServicing-consider
  Unread
  dotnet/runtime#131040·github-actions[bot] opened Jul 19, 2026 · Updated Oct 9, 2026
  6

• [release/10.0] [wasm] Fix native build failing when temp path contains parentheses

  arch-wasmarea-Build-monoServicing-consider
  Unread
  dotnet/runtime#131039·github-actions[bot] opened Jul 19, 2026 · Updated Oct 9, 2026
  6

• Cold start for RX subscriptions is slower on .net10

  area-VM-coreclrtenet-performance
  dotnet/runtime#127687 · Filter by author firenero opened on May 2, 2026 · 10.0.x
  12

  

• [release/10.0]: Fix EC public key export for provider keys

  area-System.Security
  Unread
  dotnet/runtime#133956·vcsjones opened Sep 15, 2026 · Updated Oct 9, 2026
  4

  

• CLR memory corruption in .NET 10 and 11

  area-VM-coreclr
  dotnet/runtime#134928 · Filter by author masonwheeler opened on Sep 30, 2026 · 10.0.x
  3

  

• Backport #124725 to release/10.0: FileStream.Flush(flushToDisk: true) ignores fsync errors on Linux (silent data loss on NFS)

  area-System.IO
  dotnet/runtime#135201 · Filter by author antonchaika opened on Oct 5, 2026 · 10.0.x
  1

  

• [release/10.0] Fix operator precedence bug in SystemNative_FSync causing silent fsync errors

  area-System.IOServicing-consider
  Unread
  dotnet/runtime#135261·adamsitnik with CopilotAI opened Oct 6, 2026 · Updated Oct 9, 2026
  5

  

• macOS: GC suspension hangs forever when an activation signal carries another process's si_pid

  area-VM-coreclros-macosuntriaged
  dotnet/runtime#134669 · Filter by author biqas opened on Sep 25, 2026 · 10.0.x
  2

• [release/10.0] Preserve module initialization across ReadyToRun inlining

  area-ReadyToRunServicing-approved
  Unread
  dotnet/runtime#135376·AaronRobinsonMSFT opened Oct 7, 2026 · Updated Oct 9, 2026
  11

  

• [release/10.0] OpenSSL 4 support

  area-System.SecurityServicing-approved
  Unread
  dotnet/runtime#135534·vcsjones opened Oct 9, 2026 · Updated Oct 9, 2026
  3

  

• [release/10.0] Fix software EH memory leak on Unix

  area-VM-coreclrServicing-consider
  Unread
  dotnet/runtime#135546·janvorli opened Oct 9, 2026 · Updated Oct 10, 2026
  3