Linux Kernel RDMA/mlx5 NULL Pointer Dereference Vulnerability

A vulnerability in the Linux kernel's RDMA/mlx5 component can lead to a NULL pointer dereference. This issue arises because the 'obj_event->obj_sub_list' is not properly initialized before being used, potentially causing a crash by accessing a 'poisonous pointer'. The vulnerability was discovered in the context of the mlx5_core module, specifically related to event handling in the RDMA subsystem.

Impact

Exploitation of this vulnerability causes a kernel crash due to a NULL pointer dereference, disrupting system operations and potentially leading to a denial of service.