CVE-2026-31406

The CVE-2026-31406 issue is a race in the Linux kernel xfrm path during network cleanup. After cancel_delayed_work_sync() is invoked from xfrm_nat_keepalive_net_fini(), xfrm_state_fini() flushes states and __xfrm_state_delete() calls xfrm_nat_keepalive_state_updated(), which can re-schedule nat_k...