Most apartment buildings have poor ventilation. Even kitchens with a vent above the stove just recirculate the air through a filter. Since it's costly to direct the vent outside, very very few apartments and even houses have direct vent to outside, which could account for why the smell is so strong in hallway. It's very difficult in winter as windows stays closed. It wasn't until we got our own place that we finally could cook without bothering the neighbors, since we installed direct vent outside. So it helps to understand the context. Then, if they do have exterior vent but don't use, then talking to them is a solution. If they don't, then they may still be willing to open window in winter, but won't really help unless they get a window vent fan. The best thing you can do for yourself is positive pressure in your apt so at least the smell has a hard time coming in. As for the hallway, maybe the building landlord is willing to add seal to their door to help contain the smell. Anyway it's tough due to rarity of actual kitchen vent in the US.