A. For every CM elliptic curve E de ned over a number eld F containing the CM eld K, we prove that the family of p ∞ -division elds of E, with p ∈ N prime, becomes linearly disjoint over F after removing an explicit nite subfamily of elds. If F = K and E is obtained as the base-change of an elliptic curve de ned over Q, we prove that this nite subfamily is never linearly disjoint over K as soon as it contains more than one element.