CVE-2026-9263

The CVE-2026-9263 issue affects Zephyr’s ISO Adaptation Layer (ISOAL) in the Bluetooth controller. The root cause is that framed ISO PDU start segments (sc=0) with len len - 3 to underflow when len is 0–2. This produced an oversized length (up to 253–255) that was passed to isoal_rx_append_to_sdu...