Superman is often said to be vulnerable to mental attack. But He has resisted many mental attack. So I want to elucidate his mental strength. Can he resist these mental attack?
1. Gorilla Grodd's telepathy
2. Maxwell Lord's telepathy
3. injecting Brainiac's nanoboto into his brain
4. Purpleman's control
5. Martian Manhunter's telepathy
6. Xavier's telepathy
7. Darkseid's telepathy
8. Average Marvel Hell Lord's magic
9. Thanos's telepathy
10. Galactus telepathy
Round1: New52 Superman
Round2: Pre Flash Point Superman
Depends on the writer actually. Sometimes he can shrug off telepathy of Mxy twins throwing entire universe's weight into his mind or an elder goddess rupturing entire timelines in his mind and sometimes even low level telepaths can control him.
His resistance to telepathy is wildly inconsistent.
There's usually a reason the low level telepaths control him, though. Like Sleeze only controlling him after Barda knocks him out with a sneak attack. (Leading to the infamous porno scene he made them do..)
__________________ What CDTM believes;
Never let anyone else define you. Don't be a jerk just to be a jerk, but if you are expressing your true inner feelings and beliefs, or at least trying to express that inner child, and everyone gets pissed off about it, never NEVER apologize for it. Let them think what they want, let them define you in their narrow little minds while they suppress every last piece of them just to keep a friend that never liked them for themselves in the first place.
Ostrander wrote MM sifting through every mind on Earth for a specific piece of information. Yet he couldn't even locate Superman telepathically, if he didn't want to be found.
Which makes sense. His secret identity wouldn't last long without some telepathic resistance.
__________________ What CDTM believes;
Never let anyone else define you. Don't be a jerk just to be a jerk, but if you are expressing your true inner feelings and beliefs, or at least trying to express that inner child, and everyone gets pissed off about it, never NEVER apologize for it. Let them think what they want, let them define you in their narrow little minds while they suppress every last piece of them just to keep a friend that never liked them for themselves in the first place.
You forgot to mention Superman also had Doomsday in his body as well and Brainiac played with his mind the entire time...showing him images and everything.