# VideoCapture crashes on Windows 11 after KB5077181 update (CAP\_DSHOW heap corruption, MSMF warnings)

**URL:** <https://forum.opencv.org/t/videocapture-crashes-on-windows-11-after-kb5077181-update-cap-dshow-heap-corruption-msmf-warnings/24373>\
**Category:** Uncategorized\
**Tags:** windows, videoio\
**Created:** [February 23, 2026, 2:42pm UTC](https://forum.opencv.org/t/videocapture-crashes-on-windows-11-after-kb5077181-update-cap-dshow-heap-corruption-msmf-warnings/24373 "2026-02-23T14:42:35Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Kyrylo\_Semenko](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/kyrylo_semenko/32/13154_2.png) [@Kyrylo\_Semenko](https://forum.opencv.org/u/Kyrylo_Semenko)\
**Post date:** [February 23, 2026, 2:42pm UTC](https://forum.opencv.org/t/videocapture-crashes-on-windows-11-after-kb5077181-update-cap-dshow-heap-corruption-msmf-warnings/24373/1 "2026-02-23T14:42:35Z")

</div>

I’m using OpenCV, Windows 11 64-bit, and a Logitech C920 PRO USB camera. OpenCV 4.9.0 from [https://opencv.org/releases/](https://opencv.org/releases/). Same behavior with version 4.12.0.

VideoCapture with CAP\_DSHOW had been working reliably for several years until Windows installed the **2026-02 Security Update (KB5077181) (26100.7840)**.

Even before applying this update, there were occasional crashes in  
`C:\WINDOWS\SYSTEM32\ntdll.dll` with a “freeing already freed memory” type of error.

After installing the update, this error now happens regularly:

`(38c8.ce0): Access violation - code c0000005 (first chance)`  
`HEAP[java.exe]: HEAP: Free Heap block 000002394A772F10 modified at 000002394A772F48 after it was freed`  
`(38c8.ce0): Break instruction exception - code 80000003 (first chance)`  
`ntdll!RtlpBreakPointHeap+0x16: 00007ffb`

I switched from CAP\_DSHOW to CAP\_MSMF, and the regular crash stopped. However, I now get warnings in the log:

```auto
2026-02-12 08:39:15.643 [CameraWorker_video_cam-pos] INFO
c.d.duckserver.camera.CameraWorker -
The source for VideoCapture opens: ‘1’, backendName: ‘MSMF’, captureType: ‘1400’

[WARN:10@570.361] global cap_msmf.cpp:475
`anonymous-namespace’::SourceReaderCB::OnReadSample
videoio(MSMF): OnReadSample() is called with error status: -1072873821

[WARN:10@570.361] global cap_msmf.cpp:487
`anonymous-namespace’::SourceReaderCB::OnReadSample
videoio(MSMF): async ReadSample() call is failed with error status: -1072873821

```

Occasionally, the application also crashes even when using CAP\_MSMF.

Has anyone experienced something similar? Any tips or ideas on how to ensure a stable stream?

---

<div class="post-metadata">

**Author:** ![crackwitz](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/crackwitz/32/14_2.png) [@crackwitz](https://forum.opencv.org/u/crackwitz)\
**Post date:** [February 23, 2026, 5:41pm UTC](https://forum.opencv.org/t/videocapture-crashes-on-windows-11-after-kb5077181-update-cap-dshow-heap-corruption-msmf-warnings/24373/2 "2026-02-23T17:41:50Z")

</div>

you should take this to opencv’s issues on github. if you’re lucky, you can find it already resolved among the closed issues (i.e. make sure you can repro the issue on the latest release of opencv). if not… that’s the best place to report such bugs.

> **[opencv/opencv](https://github.com/opencv/opencv/issues)**
>
> Open Source Computer Vision Library. Contribute to opencv/opencv development by creating an account on GitHub.

---

<div class="post-metadata">

**Author:** ![Kyrylo\_Semenko](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/kyrylo_semenko/32/13154_2.png) [@Kyrylo\_Semenko](https://forum.opencv.org/u/Kyrylo_Semenko)\
**Post date:** [March 12, 2026, 7:01am UTC](https://forum.opencv.org/t/videocapture-crashes-on-windows-11-after-kb5077181-update-cap-dshow-heap-corruption-msmf-warnings/24373/4 "2026-03-12T07:01:37Z")

</div>

The following procedure helped. Disconnect all USB cameras. In Device Manager - View - Show hidden devices. Delete Imaging devices of all disconnected cameras. Reconnect the cameras to USB. In the application, set the port indexes (0, 1..) and backend type CAP\_DSHOW or CAP\_MSMF (or another depending on the camera type).