code injection into a buffer is it possible?

hi everyone,

i have the following problem:
suppose i have a buffer of bytes as well as an instruction like mov $0x1,%eax with machine code : b8 01 00 00 00
do you think that it might be possible to to insert this code into the buffer and then to redirect the program to continue executing the instruction contained in that buffer with a jump?

 

One presumes you are aspiring to be a cracker/exploiter?