OSV-2026-815 Heap-buffer-overflow in ihevcd_sao_shift_ctb

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=516422427 Crash type: Heap-buffer-overflow READ 1 Crash state: ihevcdsaoshiftctb ihevcdprocess ihevcdparseslicedata...