LowLevelFatalError [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\HAL\MallocBinned2.cpp] [Line: 1438]FMallocBinned2 Attempt to realloc an unrecognized block 000001CBD8350000 canary == 0x0 != 0xe3

Keep encountering the same crash at seemingly random points, I’ve looked up this error and tried just about every solution I can find, including massively optimising my lighting. If anyone has any idea how to prevent this crash, I’d be incredibly grateful for any leads. Thanks for reading, thank you

Hey, did you find a solution for this?

Greetings @Manula96

I’m late to the party. But, I’d be happy to take a look. Do you have a full crash log of the error you’re seeing? I’ll monitor the thread.

LowLevelFatalError [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\HAL\MallocBinned2.cpp] [Line: 1438]
FMallocBinned2 Attempt to realloc an unrecognized block 0000021EE07B0000 canary == 0x0 != 0xe3

0x00007ff6f0cbbbee Celestial-Win64-Shipping.exe!UnknownFunction
0x00007ff6f1e6a47e Celestial-Win64-Shipping.exe!UnknownFunction
0x00007ff6f210e8e2 Celestial-Win64-Shipping.exe!UnknownFunction
0x00007ff6f0c73d7b Celestial-Win64-Shipping.exe!UnknownFunction
0x00007ff6f0c4f9a7 Celestial-Win64-Shipping.exe!UnknownFunction
0x00007ff6f0c528e3 Celestial-Win64-Shipping.exe!UnknownFunction
0x00007ff6f0c5725e Celestial-Win64-Shipping.exe!UnknownFunction
0x00007ff6f0c4bef3 Celestial-Win64-Shipping.exe!UnknownFunction
0x00007ff6f0c6a506 Celestial-Win64-Shipping.exe!UnknownFunction
0x00007ff6f0c52530 Celestial-Win64-Shipping.exe!UnknownFunction
0x00007ff6f0ccf1c4 Celestial-Win64-Shipping.exe!UnknownFunction
0x00007ff6f0df0d37 Celestial-Win64-Shipping.exe!UnknownFunction
0x00007ff6f0dee4b1 Celestial-Win64-Shipping.exe!UnknownFunction
0x00007ffd342d257d KERNEL32.DLL!UnknownFunction

Crash in runnable thread Foreground Worker #1

Greetings @Tonster2029

Welcome to the Unreal Engine Forum! Take a peek at this thread and see if this is the same issue(If so, check the solution found there) Crash in FMallocBinned2::MallocExternal on Win64