In FFmpeg before 4.2, avcodec_open2 in libavcodec/utils.c allows a NULL pointer dereference and possibly unspecified other impact when there is no valid close function pointer.
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ffmpeg | Ffmpeg | * | 3.4.7 (excluding) |
| Ffmpeg | Ffmpeg | 4.0 (including) | 4.0.5 (excluding) |
| Ffmpeg | Ffmpeg | 4.1 (including) | 4.1.5 (excluding) |