core/rendering/compositing/RenderLayerCompositor.cpp in Blink, as used in Google Chrome before 38.0.2125.102 on Android, does not properly handle a certain IFRAME overflow condition, which allows remote attackers to spoof content via a crafted web site that interferes with the scrollbar.
Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.