The iscsi_if_rx function in drivers/scsi/scsi_transport_iscsi.c in the Linux kernel through 4.13.2 allows local users to cause a denial of service (panic) by leveraging incorrect length validation.
https://www.exploit-db.com/exploits/42932/
https://usn.ubuntu.com/3583-2/
https://usn.ubuntu.com/3583-1/
https://patchwork.kernel.org/patch/9923803/
https://bugzilla.redhat.com/show_bug.cgi?id=1490421