diff -up evolution-data-server-3.28.5/src/camel/providers/imapx/camel-imapx-server.c.CVE-2020-16117 evolution-data-server-3.28.5/src/camel/providers/imapx/camel-imapx-server.c

--- evolution-data-server-3.28.5/src/camel/providers/imapx/camel-imapx-server.c.CVE-2020-16117	2018-07-30 15:17:06.000000000 +0200

+++ evolution-data-server-3.28.5/src/camel/providers/imapx/camel-imapx-server.c	2020-09-30 09:10:32.240788043 +0200

@@ -2979,7 +2979,8 @@ connected:

 			/* See if we got new capabilities

 			 * in the STARTTLS response. */

-			imapx_free_capability (is->priv->cinfo);

+			if (is->priv->cinfo)

+				imapx_free_capability (is->priv->cinfo);

 			is->priv->cinfo = NULL;

 			if (ic->status->condition == IMAPX_CAPABILITY) {

 				is->priv->cinfo = ic->status->u.cinfo;