MatrixSSL before 4.2.1 has an out-of-bounds read during ASN.1 handling.
https://github.com/matrixssl/matrixssl/blob/4-2-1-open/doc/CHANGES_v4.x.md#changes-between-420-and-421-june-2019
Source: Mitre, NVD
Published: 2019-07-09
Updated: 2026-06-17
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical
EPSS: 0.00433
