From df9da57e4f9b0e335075425e14580db5ab772f38 Mon Sep 17 00:00:00 2001
From: Yonghye Kwon <developer.0hye@gmail.com>
Date: Mon, 20 Jul 2026 20:20:55 +0900
Subject: [PATCH] videoio(MSMF): close SourceReaderCB event handle

SourceReaderCB owns an Event created for asynchronous frame delivery,
but its destructor did not close the handle. Close it when the callback
is destroyed to prevent one Event handle from leaking across repeated
MSMF capture lifecycles.

Fixes #29562
---
 modules/videoio/src/cap_msmf.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/modules/videoio/src/cap_msmf.cpp b/modules/videoio/src/cap_msmf.cpp
index cc9e5e335e..3cf1b25d4b 100644
--- a/modules/videoio/src/cap_msmf.cpp
+++ b/modules/videoio/src/cap_msmf.cpp
@@ -566,6 +566,8 @@ private:
     // Destructor is private. Caller should call Release.
     virtual ~SourceReaderCB()
     {
+        if (m_hEvent)
+            CloseHandle(m_hEvent);
         CV_LOG_INFO(NULL, "terminating async callback");
     }