FreeBSD 원격 커널 RCE(CVE-2026-4747)로 root 쉘 획득

This FreeBSD kernel RPC vulnerability demonstrates how memory corruption in RPCSEC_GSS authentication handlers can escalate to complete kernel compromise via a sophisticated multi-stage ROP chain requiring only valid Kerberos credentials. The exploit is particularly critical for NFS servers, making patching a high priority for any affected infrastructure. Understanding this attack pattern is essential for recognizing similar privilege-escalation risks in kernel-level RPC implementations.