FartGate -- CBS Denies Tiger Supplied It

CBS is broken-hearted, swearing Tiger wasn't the one who farted.

Moonves' minions have finally responded to FartGate '09, telling TMZ Tiger Woods wasn't gassy on 18 at the Buick Open -- and the obvious flatulent sound came from somebody else.

But CBS didn't crack this caper -- refusing to say who cut the cheese.

The mystery lingers...