Keriah on Chol haMoed

Hi,

If a burial takes place on the second day of Yom Tov, then mourners do not tear keriah until after the entire Yom Tov (including intervening chol hamoed days) concludes.

If a burial takes place on chol hamoed, though, then one tears keriah during the funeral on chol hamoed.

(Rav Moshe Feinstein, Igrot Moshe Orach Chaim 1:164)

Have a good day,
Mordechai