The UMDK's core libraries are licensed under the MIT License.
Files in src/usock/ums/kmod directory are kernel code licensed under the GNU General Public License, version 2.

The UMDK uses single-line references to Unique License Identifiers as defined by the Linux Foundation's SPDX project (https://spdx.org/).
The line in each individual source file identifies the license applicable to that file.

The current set of valid, predefined SPDX identifiers can be found on the SPDX License List at https://spdx.org/licenses/.

The 'LICENSES/' directory contains all the licenses used by the sources included in the UMDK source tree.