Vulnerability CVE-2023-52647
Published: 2024-05-01

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

media: nxp: imx8-isi: Check whether crossbar pad is non-NULL before access

When translating source to sink streams in the crossbar subdev, the
driver tries to locate the remote subdev connected to the sink pad. The
remote pad may be NULL, if userspace tries to enable a stream that ends
at an unconnected crossbar sink. When that occurs, the driver
dereferences the NULL pad, leading to a crash.

Prevent the crash by checking if the pad is NULL before using it, and
return an error if it is.

 References:
https://git.kernel.org/stable/c/c95318607fbe8fdd44991a8dad2e44118e6b8812
https://git.kernel.org/stable/c/c4bd29bf5b7f67925bc1abd16069f22dadf5f061
https://git.kernel.org/stable/c/91c8ce42fcde09f1da24acab9013b3e19cb88a4e
https://git.kernel.org/stable/c/eb2f932100288dbb881eadfed02e1459c6b9504c
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