CVSS 3.1
7.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2021-44149
High (7.8) in trustedfirmware op-tee. EPSS 0.4% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 28% of CVEs (scores of 2026-10-31)
- Published
- Modified
- Record from
- the NVD, synced
Affected
- trustedfirmware:op-tee
References
- https://github.com/OP-TEE/optee_os/tags
- https://github.com/f-secure-foundry/advisories/blob/master/Security_Advisory-Ref_FSC-HWSEC-VR2021-0002-OP-TEE_TrustZone_bypass_at_wakeup.txt
- https://github.com/OP-TEE/optee_os/tags
- https://github.com/f-secure-foundry/advisories/blob/master/Security_Advisory-Ref_FSC-HWSEC-VR2021-0002-OP-TEE_TrustZone_bypass_at_wakeup.txt