CVE-2019-14431: Matrixssl

Critical severity, CVSS 9.8. EPSS: 3.6% chance of exploitation in the next 30 days.

In MatrixSSL 3.8.3 Open through 4.2.1 Open, the DTLS server mishandles incoming network messages leading to a heap-based buffer overflow of up to 256 bytes and possible Remote Code Execution in parseSSLHandshake in sslDecode.c. During processing of a crafted packet, the server mishandles the fragment length value provided in the DTLS message.

Affected products

• Matrixssl Matrixssl: from 3.8.2, up to and including 4.2.1

Published 2019-07-29. Last modified 2026-06-17.