diff --git a/gnu/packages/bittorrent.scm b/gnu/packages/bittorrent.scm
index 800a42eea5..053988c8db 100644
--- a/gnu/packages/bittorrent.scm
+++ b/gnu/packages/bittorrent.scm
@@ -66,6 +66,7 @@
               (uri (string-append
                     "https://transmission.cachefly.net/transmission-"
                     version ".tar.xz"))
+              ;; CVE-2018-5702
               (patches (search-patches "transmission-fix-dns-rebinding-vuln.patch"))
               (sha256
                (base32