diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index e2a9e8879f58..18d0ec15557c 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -106,9 +106,9 @@ void mconsole_version(struct mc_request *req)
 {
 	char version[256];
 
-	sprintf(version, "%s %s %s %s %s", utsname()->sysname,
-		utsname()->nodename, utsname()->release, utsname()->version,
-		utsname()->machine);
+	snprintf(version, sizeof(version), "%s %s %s %s %s",
+		 utsname()->sysname, utsname()->nodename, utsname()->release,
+		 utsname()->version, utsname()->machine);
 	mconsole_reply(req, version, 0, 0);
 }