Between 29 September and 6 October 1942, "P48" conducted another patrol, in the Alboran Sea, but did not record any sinkings. On 31 October, "P48" departed Gibraltar for another patrol in the Mediterranean, with orders to conduct a special landing operation off Algiers, then proceed to Malta. Her armament had been reduced to six torpedoes overall to make space for the extra equipment. On 4 October, "P48" launched a landing party in a folbot, then acted as a directional radio beacon during the Allied landings three days later. After being ordered to patrol off Bizerte, Tunisia, "P48" sighted an enemy merchant ship and attacked it with three torpedoes, but missed. After another unsuccessful attack, the submarine ended her patrol in Malta and joined the 10th Submarine Flotilla which was based there.