Hello there!

Firstoff, thanks for creating and maintaining this useful package.
Really appreciated.

I installed it on one box some versions ago and I decided to test it on other
boxes, as well.

However, I have just found that linux-vulnerability-mitigation/20260519.1-1
(currently in Debian unstable) fails to cleanly install, if I choose the
manual mode to select mitigations:

    # aptitude install linux-vulnerability-mitigation
    The following NEW packages will be installed:
      linux-vulnerability-mitigation
    [...]
    Preconfiguring packages ...
    find: ‘/usr/share/linux-vulnerability-mitigation/mitigations’: No such file or directory
    Selecting previously unselected package linux-vulnerability-mitigation.
    [...]

A debconf dialog appears and asks the user to choose a method to select
mitigations. If I choose "manual", the following happens:

    Usage: linux-vulnerability-mitigation install -m|--mitigation={MITIGATION|MITIGATION1,MITIGATION2,...|ALL}

    See linux-vulnerability-mitigation-install(1), linux-vulnerability-mitigation(1) and linux-vulnerability-mitigation(7) for more information.
    dpkg: error processing package linux-vulnerability-mitigation (--configure):
     old linux-vulnerability-mitigation package postinst maintainer script subprocess failed with exit status 1
    Processing triggers for man-db (2.13.1-1)…
    Errors were encountered while processing:
     linux-vulnerability-mitigation
    E: Sub-process /usr/bin/dpkg returned an error code (1)
    Setting up linux-vulnerability-mitigation (20260519.1-1)…
    Usage: linux-vulnerability-mitigation install -m|--mitigation={MITIGATION|MITIGATION1,MITIGATION2,...|ALL}

    See linux-vulnerability-mitigation-install(1), linux-vulnerability-mitigation(1) and linux-vulnerability-mitigation(7) for more information.
    dpkg: error processing package linux-vulnerability-mitigation (--configure):
     old linux-vulnerability-mitigation package postinst maintainer script subprocess failed with exit status 1
    Errors were encountered while processing:
     linux-vulnerability-mitigation


After purging the package, I tried to install it again, but this time I chose
"none".
The installation succeeded.
But, needless to say, there was no debconf dialog to manually select the
mitigations.
I could however manually install the mitigations I needed with:

  $ linux-vulnerability-mitigation check
  $ linux-vulnerability-mitigation status
  # linux-vulnerability-mitigation install -m CVE-2026-43494


Maybe I will stick to the "none" mode and manage mitigations with the
above commands.

But I think the "manual" mode should be fixed (or dropped entirely).

Please fix this bug.
Thanks for your time and dedication!