PAGE_FAULT_BEYOND_END_OF_ALLOCATION: How to Fix BSOD 0x000000CD Once and for All

What Is BSOD Error 0x000000CD?

The 0x000000CD Blue Screen of Death (BSOD), labeled as "PAGE_FAULT_BEYOND_END_OF_ALLOCATION", indicates a critical memory error caused when the system attempts to access memory beyond the bounds of a driver's allocated pool. This is a severe violation that forces Windows to crash to prevent further system corruption.

In essence, a faulty or misbehaving driver has overstepped its memory boundaries, either due to a bug, corruption, or a conflict with the operating system. This kind of error can point to deeply embedded issues with third-party drivers or poorly developed hardware/software integrations.

What Does “PAGE_FAULT_BEYOND_END_OF_ALLOCATION” Mean?

When a driver allocates memory from the pool (a reserved section for drivers and kernel operations), it must only use the range it has been given. If it tries to read or write past that range, it results in a page fault—a memory access violation.

This is often a programming mistake or a sign of a bad driver, malicious code, or memory corruption.

Common Causes of BSOD 0x000000CD

Here are the most typical reasons this BSOD occurs:

1. Buggy or Incompatible Drivers

Most commonly caused by a device driver that over-allocates or mishandles memory.

2. Corrupted System Files

System files responsible for handling memory and driver operations can become corrupt, leading to bad memory accesses.

3. Faulty RAM (Random Access Memory)

If your RAM is failing, the OS might believe it’s accessing valid memory even when it’s not.

4. Overclocking or BIOS Issues

Overclocking memory or CPU beyond safe limits can cause unexpected memory access errors.

5. Malware or Rootkits

Some malicious software attempts to manipulate drivers or kernel memory, causing illegal access to memory.

6. Conflicts Between Hardware Drivers

Multiple drivers accessing the same resource pool without proper synchronization.

How to Fix BSOD Error 0x000000CD

Follow these steps carefully to isolate and fix the issue:

1. Boot into Safe Mode

To prevent further crashes while troubleshooting:

• Restart your PC and press F8 (or hold Shift while clicking Restart).
• Choose Safe Mode with Networking.

2. Use Driver Verifier to Identify Faulty Drivers

The built-in Driver Verifier tool checks for illegal driver operations.

1. Press Win + R, type verifier, and press Enter.
2. Select "Create custom settings", check "Select individual settings", and enable pool tracking, IRP logging, and deadlock detection.
3. Choose "Select driver names from a list" and check non-Microsoft drivers.
4. Reboot.

Your system may crash again, but this time it will generate logs pointing to the exact faulty driver.

To disable Driver Verifier if stuck in a boot loop, boot to Safe Mode and run:
verifier /reset

3. Update or Roll Back Drivers

Once you've identified the faulty driver:

• Visit the device manufacturer’s site for the latest version.
• If the problem began after an update, roll back the driver via:
  
  • Device Manager → Right-click device → Properties → Driver tab → Roll Back Driver.

4. Scan for Malware

Run a deep scan using trusted antivirus or anti-malware software. Rogue software may hook into drivers.

5. Check RAM for Errors

Corrupt memory can cause boundary violations.

• Run Windows Memory Diagnostic (mdsched.exe) or use MemTest86 (bootable USB tool).
• Replace any faulty RAM sticks.

6. System File Checker and DISM Scan

Corrupted system files can result in driver misbehavior.

sfc /scannow

Then run:

DISM /Online /Cleanup-Image /RestoreHealth

7. Update BIOS/UEFI

Check your motherboard manufacturer’s website for BIOS updates, especially if you're using newer hardware on older firmware.

8. Perform System Restore or Reset

If all else fails:

• Try System Restore to go back to a stable state.
• Or, reset your PC while keeping files:
  Settings → Update & Security → Recovery → Reset this PC

Tips to Prevent BSOD 0x000000CD in the Future

• Always install WHQL-certified drivers from trusted sources.
• Use Driver Verifier after installing new drivers during testing.
• Regularly scan your system for malware and registry corruption.
• Avoid aggressive overclocking unless fully tested.
• Run Windows Updates to ensure OS and driver compatibility.
• Use quality RAM modules from reputable brands.

Final Thoughts

The 0x000000CD PAGE_FAULT_BEYOND_END_OF_ALLOCATION BSOD is a clear sign that something is seriously wrong with a driver’s memory handling. While it can be caused by faulty RAM or malware, it usually traces back to poorly coded or incompatible drivers. By carefully following the diagnostics and repair steps above, you can not only fix the error—but also strengthen your system’s resilience for the future.

Support.Com Can Help!

If you’re still having trouble, consider reaching out to Support.Com for a personalized solution to all technical support issues.