We've published package update for all supported releases that include several security fixes, including fenix illumos 18003 18020 18117

BUG 18003: 18003 poll(4D) needs to better-check numfds (CVE-2026-35384) (Closed)

↳ illumos.org/issues/18003

BUG 18020: Double copyin of dld_ioc consumers (Closed)

↳ illumos.org/issues/18020

BUG 18117: SCTP needs to better-check INIT ACK chunk parameters (Closed)

↳ illumos.org/issues/18117

Release notes at omnios.org/rn/r58 (and similar for r56 and r54)

thanks andyf