CVE-2021-47557

Summary (CVE-2021-47557) : In the Linux kernel, the net/sched sch_ets code could expose a NULL pointer dereference in the DRR active list when the number of DRR classes decreases, allowing a crash via cl->qdisc->ops->peek(cl->qdisc) if cl->qdisc is NULL. This affects the ETS qdisc ...