OpenTTD is a clone of Transport Tycoon Deluxe.
The vulnerability is caused due to missing out-of-bound check within the “HandleCrashedAircraft()” function.
A remote attacker could possibly cause a Denial of Service condition.
There is no known workaround at this time.
All OpenTTD users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=games-simulation/openttd-1.3.3"