In the Linux kernel before 5.2.10, there is a use-after-free bug that can be caused by a malicious USB device in the drivers/usb/class/cdc-acm.c driver, aka CID-c52873e5a1ef.
lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html
www.openwall.com/lists/oss-security/2019/12/03/4
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.10
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c52873e5a1ef72f845526d9f6a50704433f9c625
lists.debian.org/debian-lts-announce/2020/01/msg00013.html
lists.debian.org/debian-lts-announce/2020/03/msg00001.html