Ps3 has trouble reading some CD's?

The PS3 has a .3% chance of malfunctioning, your PS3 may be one of the unlucky ones. There is also the chance that it's the discs not the PS3 it's self, your disc maybe scratched or something. I think it's the disc but there is that slight chance your PS3 may have a problem. I'm not really good at figuring out PS3 problems or telling you what to do but it may just be the disc.