In the Linux kernel, the following vulnerability has been resolved: drm/i915/hdcp: Add encoder check in intel_hdcp_get_capability Sometimes during hotplug scenario or suspend/resume scenario encoder is not always initialized when intel_hdcp_get_capability add a check to avoid kernel null pointer dereference.
https://git.kernel.org/stable/c/4912e8fb3c37fb2dedf48d9c18bbbecd70e720f8
https://git.kernel.org/stable/c/31b42af516afa1e184d1a9f9dd4096c54044269a