CVE-2026-45845 net/sched: taprio: fix NULL pointer dereference in class dump

In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: fix NULL pointer dereference in class dump When a TAPRIO child qdisc is deleted via RTMDELQDISC, tapriograft is called with new == NULL and stores NULL into q-qdiscscl - 1. Subsequent RTMGETTCLASS dump operatio...