CVE-2021-44149

7.8 HIGH
Published: December 07, 2021 Modified: June 05, 2026
View on NVD

Description

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/OP-TEE/optee_os/tags
Source: cve@mitre.org
Release Notes Third Party Advisory
https://github.com/f-secure-foundry/advisories/blob/master/Security_Advisory-Ref_FSC-HWSEC-VR2021-0002-OP-TEE_TrustZone_bypass_at_wakeup.txt
Source: cve@mitre.org
Third Party Advisory
https://github.com/OP-TEE/optee_os/tags
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes Third Party Advisory
https://github.com/f-secure-foundry/advisories/blob/master/Security_Advisory-Ref_FSC-HWSEC-VR2021-0002-OP-TEE_TrustZone_bypass_at_wakeup.txt
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.8 / 10.0
EPSS (Exploit Probability)
0.3%
26th percentile
Exploitation Status
Not in CISA KEV

Affected Vendors

nxp trustedfirmware