CVE-2026-53263

In Linux kernel CVE-2026-53263, the 6lowpan multicast context address compression had an off‑by‑one in the second memcpy of lowpan_iphc_mcast_ctx_addr_compress(), using data[1] and ipaddr->s6_addr[11] instead of data[2] and ipaddr->s6_addr[12]. This caused data[1] to be overwritten (RIID co...