Linux Kernel ctucanfd NULL Pointer Dereference Vulnerability

A vulnerability in the Linux kernel's ctucanfd component can lead to a NULL pointer dereference. This issue arises when the allocation of a socket buffer (skb) fails, leaving the pointer to the struct can_frame as NULL. While this NULL pointer scenario is addressed in most parts of the ctucan_err_interrupt() function, one location was overlooked, creating a potential vulnerability.

Impact

Exploitation of this vulnerability can cause a NULL pointer dereference, leading to a crash of the kernel or the affected process.