Fear that NVIDIA Grabo will expose browsing screen in privacy mode

Most web browsers do not have browsing history "Privacy modeThere are many people who self-defend by using privacy mode to prevent the browsing history from remaining on the PC when browsing online shopping and dubious sites. However, if you are using NVIDIA's graphics board, it is pointed out that there is a danger that even a browsing screen in private mode will be displayed on the web browser due to a driver bug.

How Nvidia breaks Chrome Incognito | charliehorse55
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Evan Andersen, a student at the University of Toronto,Diablo 3I launched the web browser Google Chrome to play, I encountered an event where a screen of pornographic site is displayed. The following screenshot is the Chrome screen at that time, the red square is displayed, and the pornographic image is screening processed.


Mr. Andersen was surprised by sudden events, but this porn site was just browsing on Chrome before playing Diablo 3. However, since we were using Chrome privacy mode when browsing pornographic sites, we were surprised by the unexpected "reunion" with pages that should not have browsing history originally. According to Mr. Andersen, the cause of this trouble is a bug in NVIDIA's graphic board driver. The drawing content stored in the memory of the graphic board has a structure that the data is not erased until the application is succeeded and the browsing history in the privacy mode is cached by the NVIDIA graphic driver bug and the browser is terminated Although data was not erased even though it was made, it was released as Chrome restarted as the previous viewing screen.

According to Mr. Andersen, browsing in the privacy mode is a few hours before game play, and even after several hours, it is said that it was stored in the GPU memory as a frame buffer. Andersen announced this report at reddit and it seems that a patch that has already fixed similar bugs has also been created and released. Mr. Andersen is complaining about the danger that privacy information may be leaked due to use of the shared PC because of a bug in this graphics driver of NVIDIA.


Mr. Andersen has recognized similar bugs about two years ago and has reported the contents of the bug to NVIDIA and Google. However, although NVIDIA admits the existence of bugs, it still does not distribute fix drivers. In addition, Google said that "Chrome's privacy mode is not assumed to be used on a shared PC".