An incorrect assumption about block structure in Blink in Google Chrome prior to 57.0.2987.133 for Mac, Windows, and Linux, and 57.0.2987.132 for Android, allowed a remote attacker to potentially exploit memory corruption via a crafted HTML page that triggers improper casting.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.