Index: share/man/man4/linux.4
===================================================================
--- share/man/man4/linux.4
+++ share/man/man4/linux.4
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd August 1, 2017
+.Dd September 9, 2019
 .Dt LINUX 4
 .Os
 .Sh NAME
@@ -75,7 +75,11 @@
 The following
 .Xr sysctl 8
 tunable variables are available:
-.Bl -tag -width compat.linux.oss_version
+.Bl -tag -width compat.linux.exec_unbranded
+.It compat.linux.exec_unbranded
+If set to 1, execute binaries which lack proper ELF brand
+and cannot otherwise be recognized as Linux binaries.
+Defaults to 0.
 .It compat.linux.osname
 Linux kernel operating system name.
 .It compat.linux.osrelease
Index: sys/amd64/linux/linux_sysvec.c
===================================================================
--- sys/amd64/linux/linux_sysvec.c
+++ sys/amd64/linux/linux_sysvec.c
@@ -109,6 +109,10 @@
 		    u_long stack);
 static int	linux_vsyscall(struct thread *td);
 
+static int linux_exec_unbranded = 0;
+SYSCTL_INT(_compat_linux, OID_AUTO, exec_unbranded, CTLFLAG_RWTUN,
+    &linux_exec_unbranded, 0, "Execute binaries which lack proper brand");
+
 #define LINUX_T_UNKNOWN  255
 static int _bsd_to_linux_trapcode[] = {
 	LINUX_T_UNKNOWN,	/* 0 */
@@ -795,6 +799,16 @@
 	return (true);
 }
 
+static boolean_t
+linux_nobrand_supported(struct image_params *imgp)
+{
+
+	if (linux_exec_unbranded)
+		return (TRUE);
+
+	return (FALSE);
+}
+
 static Elf_Brandnote linux64_brandnote = {
 	.hdr.n_namesz	= sizeof(GNULINUX_ABI_VENDOR),
 	.hdr.n_descsz	= 16,
@@ -840,10 +854,24 @@
 	.flags		= BI_CAN_EXEC_DYN | BI_BRAND_NOTE
 };
 
+static Elf64_Brandinfo linux_nobrand = {
+	.brand		= ELFOSABI_NONE,
+	.machine	= EM_X86_64,
+	.compat_3_brand	= NULL,
+	.emul_path	= "/compat/linux",
+	.interp_path	= NULL,
+	.sysvec		= &elf_linux_sysvec,
+	.interp_newpath	= NULL,
+	.brand_note	= NULL,
+	.flags		= BI_CAN_EXEC_DYN,
+	.header_supported= linux_nobrand_supported
+};
+
 Elf64_Brandinfo *linux_brandlist[] = {
 	&linux_glibc2brand,
 	&linux_glibc2brandshort,
 	&linux_muslbrand,
+	&linux_nobrand,
 	NULL
 };