diff --git a/sys/amd64/linux/linux.h b/sys/amd64/linux/linux.h
--- a/sys/amd64/linux/linux.h
+++ b/sys/amd64/linux/linux.h
@@ -431,6 +431,7 @@
 #define LINUX_ARCH_SET_FS		0x1002
 #define LINUX_ARCH_GET_FS		0x1003
 #define LINUX_ARCH_GET_GS		0x1004
+#define LINUX_ARCH_CET_STATUS		0x3001
 
 #define	linux_copyout_rusage(r, u)	copyout(r, u, sizeof(*r))
 
diff --git a/sys/amd64/linux/linux_machdep.c b/sys/amd64/linux/linux_machdep.c
--- a/sys/amd64/linux/linux_machdep.c
+++ b/sys/amd64/linux/linux_machdep.c
@@ -242,6 +242,7 @@
 int
 linux_arch_prctl(struct thread *td, struct linux_arch_prctl_args *args)
 {
+	unsigned long long cet[3];
 	struct pcb *pcb;
 	int error;
 
@@ -275,7 +276,12 @@
 		error = copyout(&pcb->pcb_gsbase, PTRIN(args->addr),
 		    sizeof(args->addr));
 		break;
+	case LINUX_ARCH_CET_STATUS:
+		memset(cet, 0, sizeof(cet));
+		error = copyout(&cet, PTRIN(args->addr), sizeof(cet));
+		break;
 	default:
+		linux_msg(td, "unsupported arch_prctl code %#x", args->code);
 		error = EINVAL;
 	}
 	return (error);