In the Linux kernel through 4.19.6, a local user could exploit a use-after-free in the ALSA driver by supplying a malicious USB Sound device (with zero interfaces) that is mishandled in usb_audio_probe in sound/usb/card.c.
www.securityfocus.com/bid/106109
access.redhat.com/errata/RHSA-2019:2703
bugzilla.suse.com/show_bug.cgi?id=1118152
git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/commit/?id=5f8cf712582617d523120df67d392059eaf2fc4b
github.com/torvalds/linux/commit/5f8cf712582617d523120df67d392059eaf2fc4b
lists.debian.org/debian-lts-announce/2019/03/msg00034.html
lists.debian.org/debian-lts-announce/2019/04/msg00004.html
lists.debian.org/debian-lts-announce/2019/05/msg00002.html
support.f5.com/csp/article/K98155950
usn.ubuntu.com/3879-1/
usn.ubuntu.com/3879-2/
usn.ubuntu.com/3930-1/
usn.ubuntu.com/3930-2/
usn.ubuntu.com/3931-1/
usn.ubuntu.com/3931-2/
usn.ubuntu.com/3933-1/
usn.ubuntu.com/3933-2/