CVE-2019-16747

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-12-30 · updated 2026-06-17
Weakness: CWE-787

Description

In MatrixSSL before 4.2.2 Open, the DTLS server can encounter an invalid pointer free (leading to memory corruption and a daemon crash) via a crafted incoming network message, a different vulnerability than CVE-2019-14431.

Affected products

Inside Secure MatrixSSL: before 4.2.2 — fixed in 4.2.2

How to fix

Upgrade to a fixed version: Inside Secure MatrixSSL 4.2.2. Check the vendor advisory for mitigations.

References

https://github.com/matrixssl/matrixssl/blob/4-2-2-open/doc/CHANGES_v4.x.md
https://github.com/matrixssl/matrixssl/issues/33
https://github.com/matrixssl/matrixssl/releases/tag/4-2-2-open
https://github.com/matrixssl/matrixssl/blob/4-2-2-open/doc/CHANGES_v4.x.md
https://github.com/matrixssl/matrixssl/issues/33
https://github.com/matrixssl/matrixssl/releases/tag/4-2-2-open

Get alerted when CVE-2019-16747 or the next vulnerability affects your stack