CVE-2023-46849: Use of --fragment option can lead to a division by zero error which can be fatal

OpenVPN 2.6 from version 2.6.0 up to and including version 2.6.6 incorrectly restores the "--fragment" configuration under certain conditions. This can result in a division by zero error. On platforms where a division by zero is fatal, this will cause OpenVPN to crash.

This issue has been resolved in OpenVPN 2.6.7.

MITRE entry: CVE-2023-46849