CVE-2026-98611

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

bpf: Check params size before reading reserved fields

bpf_crypto_ctx_create() is a kfunc whose second argument is declared

with the __sz annotation, so the verifier only guarantees that

params__sz bytes of params are valid. The function nevertheless reads

params->reserved[0] and params->reserved[1] (offsets 14 and 15) before

comparing params__sz against the size of struct bpf_crypto_params, so a

BPF program can pass a shorter buffer and have the kernel read past the

region that was validated for it.

Move the size check in front of the reserved field reads.