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...

UBUNTU-CVE-2026-10658

btisorecv in subsys/bluetooth/host/iso.c pulled the ISO SDU header 4 bytes or, when the timestamp flag is set, the timestamped SDU header 8 bytes from the inbound HCI ISO Data buffer via netbufpullmem without first checking buf-len. The upstream hciiso handler enforces buf-len == the...

CVE-2026-10658: Out-of-bounds Write

A missing length validation in the Zephyr Bluetooth Host ISO receive path can be triggered by malformed HCI ISO data. In btisorecv subsys/bluetooth/host/iso.c, when processing PB=START/SINGLE fragments, the code pulls a TS SDU header 8 bytes, ts=1 or a non-TS SDU header 4 bytes, ts=0 without firs...