MatrixSSL 4.0.4 through 4.5.1 has an integer overflow in matrixSslDecodeTls13. A remote attacker might be able to send a crafted TLS Message to cause a buffer overflow and achieve remote code execution. This is fixed in 4.6.0.
https://github.com/matrixssl/matrixssl/security/advisories/GHSA-fmwc-gwc5-2g29
https://github.com/matrixssl/matrixssl/blob/4-6-0-open/doc/CHANGES_v4.x.md
https://www.telekom.com/en/company/data-privacy-and-security/news/advisories-504842
Source: Mitre, NVD
Published: 2023-01-09
Updated: 2026-06-17
Base Score: 10
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Severity: Critical
Base Score: 9.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.01697