Vulnerability CVE-2023-52806
Published: 2024-05-21

Description:
In the Linux kernel, the following vulnerability has been resolved:

ALSA: hda: Fix possible null-ptr-deref when assigning a stream

While AudioDSP drivers assign streams exclusively of HOST or LINK type,
nothing blocks a user to attempt to assign a COUPLED stream. As
supplied substream instance may be a stub, what is the case when
code-loading, such scenario ends with null-ptr-deref.

 References:
https://git.kernel.org/stable/c/7de25112de8222fd20564769e6c99dc9f9738a0b
https://git.kernel.org/stable/c/758c7733cb821041f5fd403b7b97c0b95d319323
https://git.kernel.org/stable/c/2527775616f3638f4fd54649eba8c7b84d5e4250
https://git.kernel.org/stable/c/25354bae4fc310c3928e8a42fda2d486f67745d7
https://git.kernel.org/stable/c/631a96e9eb4228ff75fce7e72d133ca81194797e
https://git.kernel.org/stable/c/43b91df291c8802268ab3cfd8fccfdf135800ed4
https://git.kernel.org/stable/c/fe7c1a0c2b25c82807cb46fc3aadbf2664a682b0
https://git.kernel.org/stable/c/4a320da7f7cbdab2098b103c47f45d5061f42edd
https://git.kernel.org/stable/c/f93dc90c2e8ed664985e366aa6459ac83cdab236
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