CVE-2016-6307: OpenSSL

Medium severity, CVSS 5.9. EPSS: 13.8% chance of exploitation in the next 30 days.

The state-machine implementation in OpenSSL 1.1.0 before 1.1.0a allocates memory before checking for an excessive length, which might allow remote attackers to cause a denial of service (memory consumption) via crafted TLS messages, related to statem/statem.c and statem/statem_lib.c.

Affected products

• OpenSSL OpenSSL: version 1.1.0 only

Published 2016-09-26. Last modified 2026-06-17.