0.16.3 release blog: mention CVE-2018-17144

Author: harding

_posts/en/posts/2018-09-18-release-0.16.3.md

@@ -21,7 +21,7 @@ Bitcoin Core 0.14.0 and affecting all subsequent versions though to
 0.16.2.  We highly recommend users of all affected versions immediately
 upgrade to 0.16.3.
 
-Security issue: it was discovered that older versions of Bitcoin Core
+Security issue [CVE-2018-17144][]: it was discovered that older versions of Bitcoin Core
 will crash if they try to process a block containing a transaction that
 attempts to spend the same input twice.  Such blocks are invalid, so
 they can only be created by a miner willing to sacrifice their allowed
@@ -36,5 +36,6 @@ our best to help you.
 [release notes]: /en/releases/0.16.3/
 [IRC]: https://en.bitcoin.it/wiki/IRC_channels
 [download page]: /en/download
+[CVE-2018-17144]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-17144
 
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