system-uicons/src/images/icons/warning_circle.svg

<svg height="21" viewBox="0 0 21 21" width="21" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><circle cx="10.5" cy="10.5" r="8" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/><path d="m10.5 11.5v-5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/><circle cx="10.5" cy="14.5" fill="currentColor" r="1"/></g></svg>