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Trusted Firmware OP-TEE v4.2.0 Release

Joakim Bech| Sunday, April 14, 2024|11 min read

Trusted Firmware OP-TEE: v4.2.0 Release


Trusted Firmware OP-TEE v4.2.0 was released on the 12th of April, 2024. The release is a minor version update, however it still contains quite a few fixes with 145 pull requests merged in total counting the optee_os, optee_client, optee_test and build gits. These 145 pull requests added 320 new commits since the previous release earlier this year. The updates consist of additions of a couple of new platforms, various updates to the core and drivers to the OP-TEE OS itself. In addition to that we’ve also done some improvements to the CI jobs and the Trusted Applications that comes with OP-TEE. Here are some of the main additions in OP-TEE 4.2.0:


Platform Support

CI updates

Driver Updates

Core updates

Trusted Applications

The release included updates to the following repos:

More details can be found here.

Testing of the release has been performed by the committers and can be found here Test plan for this release using the OP-TEE are here test suite. Testing results can be found in the pull request itself

The release has been tagged at 4.2.0 using the OP-TEE release procedure.

The OP-TEE release roadmap can be found here.

Any security fixes prior to the next release will be made available on the Security Advisories page.

About is an open source project implementing foundational software components for creating secure devices. Trusted Firmware provides a reference implementation of secure software for processors implementing both the A-Profile and M-Profile Arm architecture. It provides SoC developers and OEMs with a reference trusted code base complying with the relevant Arm specifications. Trusted Firmware code is the preferred implementation of Arm specifications, allowing quick and easy porting to modern chips and platforms. This forms the foundations of a Trusted Execution Environment (TEE) on application processors, or the Secure Processing Environment (SPE) of microcontrollers. Visit: is member driven and member funded. To learn more about membership and its benefits, please see the following page or send a request for more information to

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