From 34d2040de94061fa2edc4dbbfbf6d5280d33bf25 Mon Sep 17 00:00:00 2001
From: Jannis Voelker <jannis.voelker@basyskom.com>
Date: Thu, 13 Aug 2020 12:43:33 +0200
Subject: [PATCH] Fix segfault in ua_pki_openssl.c

If the value is not set to NULL, a heap-use-after-free occurs
in UA_CertificateVerification_clear().
---
 plugins/securityPolicies/openssl/ua_pki_openssl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/plugins/securityPolicies/openssl/ua_pki_openssl.c b/plugins/securityPolicies/openssl/ua_pki_openssl.c
index ba74eaaa2..ee4616b57 100755
--- a/plugins/securityPolicies/openssl/ua_pki_openssl.c
+++ b/plugins/securityPolicies/openssl/ua_pki_openssl.c
@@ -78,6 +78,8 @@ UA_CertificateVerification_clear (UA_CertificateVerification * cv) {
     UA_CertContext_sk_free (context);
     UA_free (context);
 
+    cv->context = NULL;
+
     return;
 }