How many interrupt by an exception having higher priority can be executed?

[Fkasa.1]

The execution of an interrupt handler can be preempted by an exception having higher priority.

How many interrupt by an exception having higher priority can be executed?

In the link below, two interrupts are generated. Is this number infinite?

[TDK · Accepted solution]

There are up to 16 different preemption priorities available, so effectively 16.

There are additional higher priority levels beyond this (e.g. hard fault), but generally are not in use.

[Fkasa.1]

Thank you for your reply.

We consider  interrupt can be preempted 16 times.