An issue was discovered in the Linux kernel before 4.20.2. An out-of-bounds access exists in the function build_audio_procunit in the file sound/usb/mixer.c.
https://security.netapp.com/advisory/ntap-20191004-0001/
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html