Issues

• [Planet Zoo 2]: stack overflow from a recursive access violation in ntdll during exception dispatch (ARM64EC)

  FEX-Emu/FEX#6041 · Filter by author jazzyblu opened on Oct 18, 2026

• [Source 2 ­— Deadlock, CS2]: nullptr+8 deref in tier0.dll (CTSQueue) w/o -threads 1

  FEX-Emu/FEX#6027 · Filter by author valpackett opened on Oct 12, 2026
  4

• ARM64EC: the SMC write trap is visible to the guest through NtQueryVirtualMemory

  android-wastelands
  FEX-Emu/FEX#6023 · Filter by author tarikbc opened on Oct 8, 2026

• Windows: per-instruction stepping through a rewritten RWX buffer costs a write fault and a recompile per step (Age of Empires IV)

  android-wastelands
  FEX-Emu/FEX#6022 · Filter by author tarikbc opened on Oct 8, 2026
  2

• LTO compile fails with missing stdlib functions

  FEX-Emu/FEX#6018 · Filter by author YupItzAfi opened on Oct 7, 2026
  1

• [AION 2]: ARM64EC: misaligned x86 calls pass stack arguments one slot too early

  Game relatedml-report
  FEX-Emu/FEX#6015 · Filter by author alexghergh opened on Oct 6, 2026

• .NET 6 (x64) CoreCLR JIT code hits "Invalid instruction in entry block" under ARM64EC FEX (Proton Experimental ARM64)

  ml-report
  FEX-Emu/FEX#6014 · Filter by author trashhandler46-cpu opened on Oct 6, 2026
  6

• Wine/ARM64EC: ProcessorID fallback needed for RDTSCP/RDPID support

  ml-report
  FEX-Emu/FEX#6009 · Filter by author SimonBits opened on Oct 5, 2026
  2

• SECCOMP_SET_MODE_STRICT returns EACCES without no_new_privs

  FEX-Emu/FEX#6004 · Filter by author yassinsolim opened on Oct 2, 2026

• Build: error: no matching function for call to 'getdents' (musl)

  FEX-Emu/FEX#5999 · Filter by author peppergrayxyz opened on Sep 30, 2026

• DiskCache=1 causes steamwebhelper zygote crash loop when Steam is launched through FEXBash

  FEX-Emu/FEX#5996 · Filter by author kisasexypantera94 opened on Sep 29, 2026
  1

• Implement AVX for Wow64 wine

  FEX-Emu/FEX#5993 · Filter by author Sonicadvance1 opened on Sep 27, 2026

• [Valheim Dedicated]: Intermittent SIGSEGV under FEX on Ampere (Unity headless, crossplay)

  Game relatedml-report
  FEX-Emu/FEX#5985 · Filter by author rodtrevizan opened on Sep 23, 2026
  1

• Memory Model Issues with Unaligned Loads and Stores Implementation

  FEX-Emu/FEX#5972 · Filter by author stkstoyanov opened on Sep 19, 2026
  1

• [World of Warcraft Classic Era] Infinite SIGSEGV/SIGILL loop in WowClassic_loader.dll on DGX Spark (GB10) — related to #5328

  Game relatedml-report
  FEX-Emu/FEX#5952 · Filter by author IgorVerm opened on Sep 13, 2026

• Upgrade x86 CI machine to Zen 6 when a suitable platform is available

  FEX-Emu/FEX#5948 · Filter by author Sonicadvance1 opened on Sep 11, 2026

• Wine leaks non-canonical pointers to x86-64 processes

  FEX-Emu/FEX#5946 · Filter by author Sonicadvance1 opened on Sep 10, 2026

• Make the SSE string operations faster

  FEX-Emu/FEX#5938 · Filter by author Sonicadvance1 opened on Sep 9, 2026

• [Diablo II: Resurrected]: [fails to start]

  Game relatedml-report
  FEX-Emu/FEX#5932 · Filter by author EvilToasterDBU opened on Sep 7, 2026

• Reading an empty tagged x87 register doesnt raise exception nor substitutes QNaN Indefinite

  FEX-Emu/FEX#5920 · Filter by author simon902 opened on Sep 4, 2026

• FileID needs some work on Linux

  FEX-Emu/FEX#5912 · Filter by author Plagman opened on Sep 3, 2026
  2

• FPREM/FPREM1 never compute C0/C1/C3

  FEX-Emu/FEX#5908 · Filter by author simon902 opened on Sep 3, 2026

• Blocking NtReadFile freezes all guest compilation once DEP is disabled

  ml-report
  FEX-Emu/FEX#5907 · Filter by author AviKndr opened on Sep 3, 2026

• rt_sigreturn leaves InSyscallInfo stale, causing later signal frames to overwrite the guest stack

  FEX-Emu/FEX#5901 · Filter by author chrispouliot opened on Sep 2, 2026

• x87 instructions do not produce indefinite result on invalid operand

  FEX-Emu/FEX#5899 · Filter by author simon902 opened on Sep 2, 2026