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+++ b/CHANGES
@@ -9,6 +9,19 @@
 
  Changes between 1.0.2p and 1.0.2q [xx XXX xxxx]
 
+  *) Microarchitecture timing vulnerability in ECC scalar multiplication
+
+     OpenSSL ECC scalar multiplication, used in e.g. ECDSA and ECDH, has been
+     shown to be vulnerable to a microarchitecture timing side channel attack.
+     An attacker with sufficient access to mount local timing attacks during
+     ECDSA signature generation could recover the private key.
+
+     This issue was reported to OpenSSL on 26th October 2018 by Alejandro
+     Cabrera Aldaya, Billy Brumley, Sohaib ul Hassan, Cesar Pereida Garcia and
+     Nicola Tuveri.
+     (CVE-2018-5407)
+     [Billy Brumley]
+
   *) Resolve a compatibility issue in EC_GROUP handling with the FIPS Object
      Module, accidentally introduced while backporting security fixes from the
      development branch and hindering the use of ECC in FIPS mode.