[Bug]: Windows 11 BSOD - DRIVER_OVERRAN_STACK_BUFFER

[merlinz01]

Version

trunk/main (7.2.97 r173173)

Host OS Type

Linux

Host OS name + version

Linux Mint 22.3 kernel 6.8.0-101-generic

Host Architecture

x86

Guest OS Type

Windows

Guest Architecture

x86

Guest OS name + version

Windows 11

Component

Guest Additions/Other

What happened?

After installing VirtualBox 7.2.97-173143 from the test builds and updating the Guest Additions to match, my Windows 11 virtual machine displays a BSOD a few seconds after starting to boot. I can boot in Safe Mode.

VBox.log

I get this twice:

Then this:

After booting in Safe Mode:

Files associated with the event:

dump.zip

It worked fine on VirtualBox 7.2.97 r171659.

How can we reproduce this?

Do the same thing, I guess.

Did you upload all of your necessary log files, screenshots, etc.?

• Yes, I've uploaded all pertinent files to this issue.

[merlinz01]

Output from upgrading host Virtualbox (to show old version):

$ sudo bash VirtualBox-7.2.97-173143-Linux_amd64.run 
[sudo] password for merlin:     
Verifying archive integrity...  100%   SHA256 checksums are OK.  100%   MD5 checksums are OK. All good.
Uncompressing VirtualBox for Linux installation  100%  
VirtualBox Version 7.2.97 r173143 (2026-03-13T15:50:04Z) installer
Removing previous installation of VirtualBox 7.2.97 r171659 from /opt/VirtualBox
Installing VirtualBox to /opt/VirtualBox
Python found: python3.12, installing bindings...
/usr/lib/python3/dist-packages/setuptools/_distutils/cmd.py:66: SetuptoolsDeprecationWarning: setup.py install is deprecated.
!!

        ********************************************************************************
        Please avoid running ``setup.py`` directly.
        Instead, use pypa/build, pypa/installer or other
        standards-based tools.

        See https://blog.ganssle.io/articles/2021/10/setup-py-deprecated.html for details.
        ********************************************************************************

!!
  self.initialize_options()

VirtualBox has been installed successfully.

You will find useful information about using VirtualBox in the user manual
  /opt/VirtualBox/UserManual.pdf
and in the user FAQ
  http://www.virtualbox.org/wiki/User_FAQ

We hope that you enjoy using VirtualBox.

[AlexanderEichner]

Can you try whether rolling back to an older version of the guest additions fixes the BSOD?

[merlinz01]

Yes, after installing Guest Additions v7.2.7-173118 it boots normally.

[AlexanderEichner]

Thanks for checking.

[bird2tori]

Was easily able to track down the issue thanks to the minidump. Some odd expectation about the security cookie value that we didn't meet with the code added in commit 1e3c7b8. Should be fixed in r173208.
Will upload a test build later today or tomorrow for you to test.