In the Linux kernel, the following vulnerability has been resolved: idpf: fix aux device unplugging when rdma is not supported by vport If vport flags do not contain VIRTCHNL2VPORTENABLERDMA, driver does not allocate vdevinfo for this vport. This leads to kernel NULL pointer dereference in idpfidcvportdevdown(), which references vdevinfo for every vport regardless. Check, if vdevinfo was ever allocated before unplugging aux device.