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Change History

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 FW_READY message (it is not
yet clear if FW_READY will arrive later).
Since the reply_data is allocated only after the FW_READY 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.

https://git.kernel.org/stable/c/230f646085d17a008b609eb8fe8befb8811868f0

https://git.kernel.org/stable/c/acacd9eefd0def5a83244d88e5483b5f38ee7287