CVE-2024-44955 Information

Description

In the Linux kernel the following vulnerability has been resolved:

drm/amd/display: Don’t refer to dc_sink in is_dsc_need_re_compute

[Why] When unplug one of monitors connected after mst hub encounter null pointer dereference.

It’s due to dc_sink get released immediately in early_unregister() or detect_ctx(). When commit new state which directly referring to info stored in dc_sink will cause null pointer dereference.

[how] Remove redundant checking condition. Relevant condition should already be covered by checking if dsc_aux is null or not. Also reset dsc_aux to NULL when the connector is disconnected.

Reference

https://git.kernel.org/stable/c/39b217193729aa45eded8de24d9245468a0c0263 https://git.kernel.org/stable/c/fcf6a49d79923a234844b8efe830a61f3f0584e4