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CVE-2021-44149

Published: Dec 7, 2021Updated: Jun 5, 2026 Sources: CVE List NVDNVD-CWE-Other
NVD MITRE
7.8CVSSHIGH
EPSS Score
0.3%
Top 74.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

NVD-CWE-Other

Affected Products

op-teetrustedfirmware
On-prem
Security Products / pki-crypto
n/an/a
trustedfirmwarecommercialSecurity Productsaka mbed tls, op-tee, trusted firmware-a

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/OP-TEE/optee_os/tags
github.com
https://github.com/f-secure-foundry/advisories/blob/master/Security_Advisory-Ref_FSC-HWSEC-VR2021-0002-OP-TEE_TrustZone_bypass_at_wakeup.txt
github.com

Timeline

Published
Dec 7, 2021
Last Updated
Jun 5, 2026

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