ISH checks 2 things to determine if the system is capable of handling Widevine CDM v4.10.2252.0 and after:
- libtcmalloc solution: only in LE 9.2.7 (but is occours instability on some devices and addons)
- TLS 64 byte alignment: for the detection it needs to add the 'arm64tls' suffix to the version number.
If one of these doesn't appear, it determines that the system cannot handle CDM version 4.10.2252 and later.