Preheat the oven to 350°F. Bake the {storebought} graham cracker crust in the preheated oven for 5 minutes.
Make the crumble topping: Whisk flour, light brown sugar, salt, and ground cinnamon in a medium bowl. Cut the softened butter into the dry ingredients using two forks or a pastry blender until coarse crumbs form.
Mix the vanilla extract with the cherry pie filling in a large bowl until combined. Pour pie filling into the prepared graham cracker crust. Evenly disperse the crumb topping over the filling until everything is covered.
Bake the pie for 40-45 minutes until the topping is golden brown and the filling is bubbly.
Let the pie cool at room temperature for 2 hours at room temperature before transferring it to the refrigerator to set it completely.