CVE-2026-98647 bpf: Fix divide-by-zero in btf_struct_walk()

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix divide-by-zero in btfstructwalk When an access goes past the struct and the last member is a flexible array, btfstructwalk folds the offset back into a single element with off - moff % t-size, but never checks that the...

CVE-2026-98647

The Linux kernel contains a divide-by-zero vulnerability in the btf_struct_walk() function. The issue occurs when a BPF program access goes past a structure where the last member is a flexible array ; the function fails to verify that the element type has a non-zero size before performing a modul...