diff --git a/NEWS b/NEWS
index 5f3ce329a2d..708dded9eaa 100644
--- a/NEWS
+++ b/NEWS
@@ -12,6 +12,9 @@ PHP                                                                        NEWS
 - Opcache:
   . Fixed build for macOS to cater with pkg-config settings. (David Carlier)
 
+- OpenSSL:
+  . Add missing error checks on file writing functions. (nielsdos)
+
 - Phar:
   . Fixed bug GH-10766 (PharData archive created with Phar::Zip format does
     not keep files metadata (datetime)). (nielsdos)
diff --git a/ext/openssl/openssl.c b/ext/openssl/openssl.c
index 408b93c6e85..10af453c895 100644
--- a/ext/openssl/openssl.c
+++ b/ext/openssl/openssl.c
@@ -5406,7 +5406,11 @@ PHP_FUNCTION(openssl_pkcs7_verify)
 			}
 
 			if (p7bout) {
-				PEM_write_bio_PKCS7(p7bout, p7);
+				if (PEM_write_bio_PKCS7(p7bout, p7) == 0) {
+					php_error_docref(NULL, E_WARNING, "Failed to write PKCS7 to file");
+					php_openssl_store_errors();
+					RETVAL_FALSE;
+				}
 			}
 		}
 	} else {