diff --git a/src/shared/socket-util.c b/src/shared/socket-util.c
index deecce8a8..a4e26b1d8 100644
--- a/src/shared/socket-util.c
+++ b/src/shared/socket-util.c
@@ -349,6 +349,10 @@ bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) {
                 break;
 
         case AF_UNIX:
+                if (a->size <= offsetof(struct sockaddr_un, sun_path) ||
+                    b->size <= offsetof(struct sockaddr_un, sun_path))
+                        return false;
+
                 if ((a->sockaddr.un.sun_path[0] == 0) != (b->sockaddr.un.sun_path[0] == 0))
                         return false;