CVE-2026-53277

The CVE-2026-53277 issue affects the Linux kernel KVM arm64 path. walk_s1() and kvm_walk_nested_s2() are expected to run with kvm->srcu held to guard memslot changes, but __kvm_at_s12() and __kvm_find_s1_desc_level() invoke these walkers without acquiring SRCU. The fix adds acquiring kvm->s...