NCC Group has some new research on TrustZone:
https://www.nccgroup.trust/us/our-research/private-key-extraction-qualcomm-keystore/
Vendor: Qualcomm
Vendor URL: https://www.qualcomm.com/
Systems Affected: Listed here
Author: Keegan Ryan
CVE Identifier: CVE-2018-11976
Risk: Critical (Key extraction from secure world to normal world possible)