CVE-2017-2784: Trustedfirmware Mbed TLS

High severity, CVSS 8.1. EPSS: 3.4% chance of exploitation in the next 30 days.

An exploitable free of a stack pointer vulnerability exists in the x509 certificate parsing code of ARM mbed TLS before 1.3.19, 2.x before 2.1.7, and 2.4.x before 2.4.2. A specially crafted x509 certificate, when parsed by mbed TLS library, can cause an invalid free of a stack pointer leading to a potential remote code execution. In order to exploit this vulnerability, an attacker can act as either a client or a server on a network to deliver malicious x509 certificates to vulnerable applications.

Affected products

• Trustedfirmware Mbed TLS: up to and including 1.3.18; version 2.0.0 only; version 2.1.0 only; version 2.1.1 only; version 2.1.2 only; version 2.1.3 only; …

Published 2017-04-20. Last modified 2026-06-17.