I used to solve the Rubik's cube using the standard algorithm. Recently, after a long time I tried doing it again. I did revisit the algorithm to solve the Rubik's cube, but I'm stuck in the top yellow layer. There is one mis-positioned yellow piece in the corner. How do I arrive at a top yellow state? Is this a possible configuration or my cube is malformatted ? I'm clueless. I have followed all possible steps that I know.

[![My cube's current state](https://i.stack.imgur.com/R1Rl5m.jpg)](https://i.stack.imgur.com/R1Rl5m.jpg)