An improper implementation in WebAssembly in Google Chrome prior to version 145.0.7632.159 allows a remote attacker to perform out-of-bounds memory access via a crafted HTML page. The issue resides within the WebAssembly component, specifically related to the `asm.js` and `asm parser` functionalities when handling invalid WebAssembly modules. This can lead to a heap-buffer-overflow in the `ShiftExpression` function.