CVE-2026-80630

CVE-2026-80630 affects the Linux kernel fq_codel queueing discipline (net/sched/sch_fq_codel.c). The root cause is an ordering bug: when fq_codel drops packets during a peek operation, it calls qdisc_tree_reduce_backlog before restoring the qlen. If qlen transiently reaches zero while peek still ...