CVE-2026-98019

In the Linux kernel, the following vulnerability has been resolved:

bpf: mark a NULL call argument precise

check_func_arg() allows bpf_register_is_null() for nullable arguments

w/o marking the underlying scalar register precise. Hence a checkpoint

created on such a path would prune against arbitrary scalar value.

check_helper_call() enforces second parameter of the

bpf_get_local_storage() to be zero, w/o marking the underlying scalar

register precise. Hence a checkpoint created on such a path would

prune against arbitrary scalar value.

Grouping these two into one patch, as they share the same fixes tag.