[Lmod-users] [SECURITY] Lmod 9.4 released (CVE-2026-85013)

[Robert M. <rt...@gm...>]

Hello All,

Lmod 9.4 is released.  This release fixes CVE-2026-85013 where a security
vulnerability was found in the Bash completion script of the module and ml
commands.  This only affects bash.  Other shells do not have this
vulnerability. The tool compgen can cause a problem with a badly formed
filename (and not the contents) can allow a local attacker to execute
arbitrary commands as the victim.

*Please upgrade immediately to Lmod 9.4.*

*If upgrading is not immediately possible, *the fixed Bash completion
script can be installed on its own, as the fix only touches this file. As
an interim workaround, Bash completion for module and ml can be disabled by
removing the completion script from the Bash completion directory.

Special thanks to AISLE and Red Hat who found and reported this
vulnerability..  Thanks also to Xavier Delaruelle for report this issue to
us.  Thanks also  to Matthew Cawood for implementing our fix and a test.

Best,
Lmod Team