The Buffer::Set function in core/cross/buffer.cc in the O3D plug-in in Google Chrome OS before 26.0.1410.57 does not prevent uninitialized data from remaining in a buffer, which might allow remote attackers to obtain sensitive information via unspecified vectors.
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.