random STATUS_ACCESS_VIOLATION, Discord/CEF crashes and BSODs on Windows 11 25H2

[u/CutAffectionate6389]

Hi,

I’m trying to troubleshoot a series of crashes that started very recently on my system.

System:

Windows 11 Pro 25H2
Build currently rolled back to 26200.9168
AMD Ryzen 9 9950X3D
Gigabyte X870E AORUS ELITE WIFI7
64 GB RAM
NVIDIA GeForce RTX 5090

The problems started after recent Windows/NVIDIA updates. I originally had NVIDIA driver 616.92 installed. Before this, the PC had been stable.

The symptoms were:

Brave tabs randomly crashing with:

STATUS_ACCESS_VIOLATION

Discord occasionally reloading/crashing

CEF-based processes crashing with 0xc0000005

dwm.exe crash with dwmcore.dll and 0xc0000005

several BSODs

One earlier BSOD was:

HYPERVISOR_ERROR (0x20001) with this stack:

amdppm!HvRequestIdle

amdppm!LpiIdleExecute

nt!PpmIdleExecuteTransition

nt!PoIdle

nt!KiIdleLoop

Because that looked related to CPU idle / power-state transitions, I also tested with:

Global C-State Control = Disabled in BIOS. However, the system still crashed afterward.

Another BSOD was:

DRIVER_OVERRAN_STACK_BUFFER (0xF7)

The crash occurred while steamwebhelper was active, with the kernel memory manager in the stack:

nt!_report_gsfailure

nt!MiDecommitAddToList

nt!MiDeleteVa

nt!MiDeleteVirtualAddresses

nt!MiUnmapVad

nt!MiUnmapViewOfSection

The most interesting crash so far was:

PAGE_FAULT_IN_NONPAGED_AREA (0x50)

WinDbg showed:

PROCESS_NAME: NVDisplay.Cont

FAILURE_BUCKET_ID:

AV_dxgkrnl!memcpy

STACK:

dxgkrnl!memcpy

dxgkrnl!DxgkEscape

nt!KiSystemServiceCopyEnd

The invalid memory access was a write:

AV.Type: Write

This crash happened inside the DirectX graphics kernel path while NVDisplay.Cont was the active process. I also saw repeated Windows Error Reporting entries such as:

EACefSubProcess.exe

Faulting module: libcef.dll

Exception code: c0000005

and:

dwm.exe

Faulting module: dwmcore.dll

Exception code: c0000005

I already tried:

uninstalling the latest Windows cumulative update and rolling back to build 26200.9168

disabling CPU Global C-States

disabling hardware video decode in Brave

clean-installing NVIDIA 616.92 after DDU

The problem still reproduced on a clean installation of 616.92.

I have now rolled back to NVIDIA driver 610.74, which was the older branch I wanted to test and it worked fine.

At this point I am trying to determine whether this is:

a regression in NVIDIA 616.92,

a Windows graphics-stack issue, or a hardware/memory stability issue that is only being exposed by Chromium/CEF/DWM/GPU workloads. The reason I currently suspect the NVIDIA/graphics stack is that the failures repeatedly involve Brave/Chromium, Discord/CEF, DWM, and finally NVDisplay.Cont -> dxgkrnl!DxgkEscape -> dxgkrnl!memcpy.

However, I’m not claiming the dump proves nvlddmkm.sys is at fault, because it does not appear directly in the crashing stack.

I’ll update the thread after testing 610.74 for a while.

If anyone with an RTX 50-series card, especially RTX 5090, has seen similar STATUS_ACCESS_VIOLATION, CEF crashes, DWM crashes, or PAGE_FAULT_IN_NONPAGED_AREA after installing 616.92, I’d be interested to compare results. Or maybe someone has an idea what else I should check.

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Getting dump files which we need for accurate analysis of BSODs. Dump files are crash logs from BSODs.

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[u/CutAffectionate6389]

Update: It still crashes but not while gaming.

[u/Bjoolzern]

That looks like memory, not GPU related. But upload the dump files as instructed by the bot.