In the Linux kernel, the following vulnerability has been resolved:
ASoC: SOF: Intel: cnl: Do not process IPC reply before firmware boot
It is not yet clear, but it is possible to create a firmware so broken that it will send a reply message before a FWREADY message (it is not yet clear if FWREADY will arrive later). Since the replydata is allocated only after the FWREADY message, this will lead to a NULL pointer dereference if not filtered out.
The issue was reported with IPC4 firmware but the same condition is present for IPC3.