Kissing The Yemeni Corner During Hajj
Is it permissible to kiss the Yemeni corner of the Ka'bah?
Kissing the Yemeni corner "Ar-Rukn Al-Yamani" is not confirmed from the Messenger of Allah (Peace and blessings be upon him).
Any act of worship which is not confirmed from the Messenger of Allah (Peace and blessings be upon him) is an innovation and not something which draws one near to Allah.
So based upon this, it is not legislated for a person to kiss the Yemeni corner since this is not confirmed upon the Prophet (Peace and blessings be upon him).
Rather, it has been mentioned in a weak Hadith that can not be used as proof.
Sheikh Ibn Uthaymeen