Does the Weapon Special Ability Vicious Multiply on a Critical Hit?

[Olaf the Stout]

One of my players in my game has a weapon with the Vicious Special Ability. What we're not sure about though is if the additional 2d6 damage Vicious deals is multiplied on a critical hit.

I know that elemental damage isn't but I wasn't sure about this special ability.

Olaf the Stout

 

[Ahnehnois]

In general, damage represented as extra dice is not multiplied with critical hits, so no.

Critical Hits
When you make an attack roll and get a natural 20 (the d20 shows 20), you hit regardless of your target’s Armor Class, and you have scored a threat. The hit might be a critical hit (or "crit"). To find out if it’s a critical hit, you immediately make a critical roll—another attack roll with all the same modifiers as the attack roll you just made. If the critical roll also results in a hit against the target’s AC, your original hit is a critical hit. (The critical roll just needs to hit to give you a crit. It doesn’t need to come up 20 again.) If the critical roll is a miss, then your hit is just a regular hit.

A critical hit means that you roll your damage more than once, with all your usual bonuses, and add the rolls together. Unless otherwise specified, the threat range for a critical hit on an attack roll is 20, and the multiplier is ×2.

Exception: Extra damage dice over and above a weapon’s normal damage is not multiplied when you score a critical hit.