An issue was discovered in the Linux kernel before 5.1.8. There is a NULL pointer dereference caused by a malicious USB device in the drivers/media/usb/siano/smsusb.c driver.
https://www.oracle.com/security-alerts/cpuApr2021.html
https://usn.ubuntu.com/4147-1/
https://usn.ubuntu.com/4118-1/
https://usn.ubuntu.com/4115-1/
https://syzkaller.appspot.com/bug?id=4a5d7c8c2b6dbedb5b7218c6d7e8666bd2387517
https://security.netapp.com/advisory/ntap-20190905-0002/
https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html
https://lists.debian.org/debian-lts-announce/2019/09/msg00015.html
https://lists.debian.org/debian-lts-announce/2019/09/msg00014.html
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.8
http://www.openwall.com/lists/oss-security/2019/08/22/5
http://www.openwall.com/lists/oss-security/2019/08/22/4
http://www.openwall.com/lists/oss-security/2019/08/22/3
http://www.openwall.com/lists/oss-security/2019/08/22/2
http://www.openwall.com/lists/oss-security/2019/08/20/2
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html