DLMFENC.sys 1.0.0.26 in DESlock+ 3.2.6 and earlier allows local users to cause a denial of service (system crash) via a certain ZERO_MEM DLMFENC_IOCTL request to \\.\DLKPFSD_Device, aka the "ring0 link list zero" vulnerability.
https://www.exploit-db.com/exploits/5142
https://exchange.xforce.ibmcloud.com/vulnerabilities/41204