PDFium, as used in Google Chrome before 44.0.2403.89, does not properly handle certain out-of-memory conditions, which allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via a crafted PDF document that triggers a large memory allocation.
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.