[{"user":"63bue258j43747143hi059d7","images":[{"image_link":"first-unique-link-http::link-to-image1-63","inStock":false},{"image_link":"second-unique-link-http::link-to-image2-63","inStock":false},{"image_link":"third-unique-link-http::link-to-image3-63","inStock":false}]},{"user":"9Ef53258j4374714phk625b3","images":[{"image_link":"anotherFirst-unique-link-http::link-to-image1-9E","inStock":false},{"image_link":"anotherSecond-unique-link-http::link-to-image2-9E","inStock":false}]}]

db.collection.update({},{"$set":{"images.$[elem].inStock":true}},{"arrayFilters":[{"elem.image_link":{"$in":["first-unique-link-http::link-to-image1-63","third-unique-link-http::link-to-image3-63","anotherSecond-unique-link-http::link-to-image2-9E"]}}],"multi":true})