libopenmpt before 0.4.3 allows a crash due to a NULL pointer dereference when doing a portamento from an OPL instrument to an empty instrument note map slot.
The product dereferences a pointer that it expects to be valid but is NULL.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libopenmpt | Openmpt | * | 0.4.3 (excluding) |
| Libopenmpt | Ubuntu | trusty | * |