CVE-2016-7053: OpenSSL

High severity, CVSS 7.5. EPSS: 21.7% chance of exploitation in the next 30 days.

In OpenSSL 1.1.0 before 1.1.0c, applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected.

Affected products

• OpenSSL OpenSSL: version 1.1.0 only; version 1.1.0a only; version 1.1.0b only

Published 2017-05-04. Last modified 2026-06-17.