The mct_u232_msr_to_state function in drivers/usb/serial/mct_u232.c in the Linux kernel before 4.5.1 allows physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted USB device without two interrupt-in endpoint descriptors.
https://www.exploit-db.com/exploits/39541/
https://github.com/torvalds/linux/commit/4e9a0b05257f29cf4b75f3209243ed71614d062e
https://bugzilla.redhat.com/show_bug.cgi?id=1317007
https://bugzilla.redhat.com/show_bug.cgi?id=1283370
http://www.ubuntu.com/usn/USN-3000-1
http://www.ubuntu.com/usn/USN-2997-1
http://www.ubuntu.com/usn/USN-2996-1
http://www.ubuntu.com/usn/USN-2971-3
http://www.ubuntu.com/usn/USN-2971-2
http://www.ubuntu.com/usn/USN-2971-1
http://www.ubuntu.com/usn/USN-2970-1
http://www.ubuntu.com/usn/USN-2968-2
http://www.ubuntu.com/usn/USN-2968-1
http://www.securityfocus.com/bid/84299
http://www.openwall.com/lists/oss-security/2016/03/14/2
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.1
http://www.debian.org/security/2016/dsa-3607
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00056.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00060.html