The umbrella organisation for Linux user groups in the country suffered a data breach in March this year.
Hesketh said a limited amount of personal information had been leaked as a result of the breach. He said it was not related to the earlier breach.
The complete details of how the March breach was effected have yet to be released.
Hesketh said the breach affected Linux Australia's legacy wiki system which was being used by a small number — 0.5 per cent — of current and non-current members.
"Within the last 6-12 months the archived wiki deployment was misconfigured and apache directory listings was enabled. Due to the nature of the wiki system used, this exposed all of the wiki data, both pages and system information."
A community member had alerted the organisation to the leak. The website has now been taken offline.