--- rpm-4.11.1.orig/lib/cpio.c	2014-11-28 12:21:50.444158675 +0100

+++ rpm-4.11.1/lib/cpio.c	2014-11-28 12:22:53.776453253 +0100

@@ -296,6 +296,9 @@

     st->st_rdev = makedev(major, minor);

     GET_NUM_FIELD(hdr.namesize, nameSize);

+    if (nameSize <= 0 || nameSize > 4096) {

+        return CPIOERR_BAD_HEADER;

+    }

     *path = xmalloc(nameSize + 1);

     read = Fread(*path, nameSize, 1, cpio->fd);