Italian North Africa is divided: Cyrenaica goes to the UK and Tripolitania (incl. Fezzan) goes to France.
Italian Somaliland probably goes to the UK, Eritrea could go to either the UK or France.
Dodecanese go to Greece.
This is all very likely.
More of Istria goes to Yugoslavia, possibly loosing Trieste.
Yup. Probably we can expect an Italo-Yugoslav much akin to the OTL 1947 one.
The Aosta Valley could go to France.
Well, we may reasonably expect France to gain Briga and Tenda like it did in OTL 1947. France could theoretically annex more, the Aosta Valley as you said, but then it is getting its own way at the peace table and is also getting more territory form Germany than it did IOTL, at least annexing Saar if not setting up Rhineland as a puppet state.
Alto Adige/Sudtirol could be partly annexed into Austria.
Probably. Austria would look less dangerous than Italy.
There is also the possibilities of treaties dividing Italy further, be it clipping off Sardinia or Sicily or something of the sort, or simply due to secession/internal unrest.
Well, if it wants, France can of course annex Sardinia. If it is getting that much leeway at the peace table, it is also annexing Rhineland. I can't see any Entente power that would be interested into annexing Sicily.
Because make it no mistake, despite what some AH.com folks may think

, Italian and German national unifications were not artificial frail constructions ready to be undone at the first serious setback the nation suffered. Any fully Italian (or German) territory the Entente nations detach shall only go if forced by Entente bayonets and shall remain an irredentist hobed in the interwar period.