The northbound stretch of the motorway between J37 and J38 was shut at around 9.40pm to allow vehicles to be recovered and for accident investigators to carry out investigations.
A spokesman for Cumbria Fire and Rescue Service said:
Nobody was trapped in their vehicles, so fire crews assisted the ambulance service with casualty care and first aid."
The road is now re-opened but police are urging motorists to take extra care while a weather warning remains in place until 11am Sunday due to predictions of wintry showers and ice.
More top news
Ofcom proposed that BT's Openreach network become a "distinct company" within the BT Group - but stopped short of calling for a sell-off.
The largest wooden playground in the UK will open at Lowther Castle in Penrith on 2nd August.
Parents in the Borders are being urged by Cumbria County Council to apply for school clothing vouchers and free school meals.