https://github.com/python/cpython/commit/99799a9d3068e857cd025fcf320ac8863c99ff3e
commit: 99799a9d3068e857cd025fcf320ac8863c99ff3e
branch: main
author: Uttam Bhadauriya <[email protected]>
committer: zooba <[email protected]>
date: 2026-11-03T17:11:58Z
summary:
gh-159118: Use multithreaded COM initialization in _wmi (GH-159463)
files:
A Misc/NEWS.d/next/Windows/2026-10-15-18-45-00.gh-issue-159118.wmiMTA.rst
M PC/_wmimodule.cpp
diff --git
a/Misc/NEWS.d/next/Windows/2026-10-15-18-45-00.gh-issue-159118.wmiMTA.rst
b/Misc/NEWS.d/next/Windows/2026-10-15-18-45-00.gh-issue-159118.wmiMTA.rst
new file mode 100644
index 000000000000000..561a5005b759755
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2026-10-15-18-45-00.gh-issue-159118.wmiMTA.rst
@@ -0,0 +1 @@
+Fix a crash (``RPC_NT_INTERNAL_ERROR``) and intermittent window class failures
in :mod:`!_wmi` under high concurrency and load by initializing COM as
multi-threaded (MTA) instead of apartment-threaded (STA).
diff --git a/PC/_wmimodule.cpp b/PC/_wmimodule.cpp
index b9a229b1398ec8d..a546313529fd1b1 100644
--- a/PC/_wmimodule.cpp
+++ b/PC/_wmimodule.cpp
@@ -67,7 +67,7 @@ _query_thread(LPVOID param)
}
if (SUCCEEDED(hr)) {
- hr = CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);
+ hr = CoInitializeEx(nullptr, COINIT_MULTITHREADED);
}
if (FAILED(hr)) {
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