CVE-2022-3786

A buffer overrun can be triggered in X.509 certificate verification,
specifically in name constraint checking. Note that this occurs after
certificate chain signature verification and requires either a CA to have
signed a malicious certificate or for an application to continue
certificate verification despite failure to construct a path to a trusted
issuer. An attacker can craft a malicious email address in a certificate to
overflow an arbitrary number of bytes containing the `.’ character (decimal
46) on the stack. This buffer overflow could result in a crash (causing a
denial of service). In a TLS client, this can be triggered by connecting to
a malicious server. In a TLS server, this can be triggered if the server
requests client authentication and a malicious client connects.

Notes