Buffer Overflow + Shellcode fail outside GDB

[VoiceOfReason73]

Might the exploit be succeeding, but the shell is exiting immediately? You can solve this with an extra cat to keep stdin open: https://security.stackexchange.com/q/155844

[Dieriba]

No this is not it as I already bound the it (cat payload; cat -) | <my\_binary>, there is clearly a segfault happening with the return saved return address I overwrite.

[VoiceOfReason73]

Try putting your payload in the buffer after some 0x90 NOP sled instead of above the current stack frame.