CVE-2021-44149
HIGHTrusted Firmware OP-TEE Trusted OS <3.15.0 - Privilege Escalation
Title source: llmDescription
An issue was discovered in Trusted Firmware OP-TEE Trusted OS through 3.15.0. The OPTEE-OS CSU driver for NXP i.MX6UL SoC devices lacks security access configuration for wakeup-related registers, resulting in TrustZone bypass because the NonSecure World can perform arbitrary memory read/write operations on Secure World memory. This involves a v cycle.
References (2)
Core 2
Core References
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/OP-TEE/optee_os/tags
Third Party Advisory x_refsource_confirm
https://github.com/f-secure-foundry/advisories/blob/master/Security_Advisory-Ref_FSC-HWSEC-VR2021-0002-OP-TEE_TrustZone_bypass_at_wakeup.txt
Scores
CVSS v3
7.8
EPSS
0.0007
EPSS Percentile
20.4%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
Status
published
Products (1)
linaro/op-tee
< 3.15.0
Published
Dec 07, 2021
Tracked Since
Feb 18, 2026