DDoS is characterised by floods, creating a DoS. But DoS can be caused by a broad range of triggers. 

[CVSS even has an example for you:][1]

> Due to a flaw in the handler function for RPC commands, it is possible
> to manipulate data pointers within the Virtual Machine Executable
> (VMX) process. This vulnerability may allow a user in a Guest Virtual
> Machine to **crash** the VMX process resulting in a **Denial of Service**
> (DoS) on the host or potentially execute code on the host.
[empasis mine]

So, yes, a simple crash is a DoS. 

 [1]: https://www.first.org/cvss/examples