sound/core/seq_device.c in the Linux kernel before 4.13.4 allows local users to cause a denial of service (snd_rawmidi_dev_seq_free use-after-free and system crash) or possibly have unspecified other impact via a crafted USB device. https://nvd.nist.gov/vuln/detail/CVE-2017-16528
CONFIG_SND_SEQUENCER=y