In core_info_read and inst_info_read in all Android releases from CAF using the Linux kernel variable \dbg_buf\ \dbg_buf->curr\ and \dbg_buf->filled_size\ could be modified by different threads at the same time but they are not protected with mutex or locks. Buffer overflow is possible on race conditions. \buffer->curr\ itself could also be overwritten which means that it may point to anywhere of kernel memory (for write).