CVE-2026-68138

Concretely, CVE-2026-68138 affects the Linux kernel net/sched path, where qdisc_get_rtab()/qdisc_put_rtab() mutate a global qdisc_rtab_list and a non-atomic refcnt without proper locking. The race between concurrent RTM_NEWTFILTER requests carrying a police action (with TCA_ACT_FLAGS_NO_RTNL) can...