diff --git a/share/man/man9/extattr.9 b/share/man/man9/extattr.9
--- a/share/man/man9/extattr.9
+++ b/share/man/man9/extattr.9
@@ -23,7 +23,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd December 23, 1999
+.Dd September 1, 2023
 .Dt EXTATTR 9
 .Os
 .Sh NAME
@@ -54,6 +54,10 @@
 and mandatory protections associated with the data in the file or
 directory; system attribute data is protected such that appropriate
 privilege is required to directly access or manipulate these attributes.
+By default processes in a
+.Xr jail 8
+can not access to the system attribute data unless allow.extattr
+configuration parameter is specified.
 .Pp
 Reads of extended attribute data may return specific contiguous regions of
 the meta-data, in the style of
@@ -77,6 +81,7 @@
 and
 .Xr VOP_SETEXTATTR 9 .
 .Sh SEE ALSO
+.Xr jail 8 ,
 .Xr VFS 9 ,
 .Xr VFS_EXTATTRCTL 9 ,
 .Xr VOP_GETEXTATTR 9 ,