CVE-2026-102916 Reachable assertion in illumos bhyve REP string instruction emulation allows guest to panic host

A reachable assertion in the illumos bhyve instruction emulator allows a guest to panic the host. When emulating a REP-prefixed MOVS or STOS instruction that accesses guest MMIO, vieemulatemovs and vieemulatestos in usr/src/uts/intel/io/vmm/vmminstructionemul.c do not clear the VIESREPEAT status...