TAttributeContainer::CopyFrom crashes when container contains invalid bone indices for active mesh

UE - Anim - Runtime - Jun 16, 2024

Currently there's no validation within the animation attribute container that bone ids are valid.  This means that client/game code can add attributes with invalid bone ids into the container and th ...

Editor crashes when replacing Packed Level Actor assets during asset deletion process

UE - World Creation - Worldbuilding Tools - Level Instances - Feb 6, 2024

Vector VM - Crash / memory stomp when using > 255 external function calls

UE - Niagara - Aug 12, 2025

The Vector VM has only every supported a byte's worth of external function calls, when we blew the limit it would index into the incorrect VM call. The new VM will also overwrite memory when exceed ...

Crash freeing FClothingComboInfo array when importing LOD Level 8 of Skeletal Mesh

UE - Simulation - Physics - Character - Nov 10, 2017

This does not occur in 4.17.2 at CL 3658906 ...

Editor Crash when selecting and deleting assets, undoing deletion in Content Examples project

UE - Graphics Features - Oct 14, 2016

I've only had this happen once. ...

Crash when trying to export unsupported Paragon Skeletal Mesh asset in 4.23

UE - Editor - Content Pipeline - Import and Export - Sep 11, 2019

When the user tries to export the Skeletal Mesh of TwinBlast (a paragon character that can be purchased off the marketplace) in 4.23. As of the time of logging this bug it is not supported in 4.23, ...