Comment 1 for bug 2043118

pulled in via upstream stable updates from 5.15.124

commit 015222ee0044b075c205010f3a6add2ed79e1159
Author: Paulo Alcantara <email address hidden>
Date: Tue Oct 4 18:41:20 2022 -0300

    cifs: use fs_context for automounts

    BugLink: https://bugs.launchpad.net/bugs/2035400

I don't see a fix for this in upstream v5.15.x (currently at .138), so I'm not sure if a newer mainline would work, but you could give them a go. Fetch from https://kernel.ubuntu.com/mainline/ and install two debs for a version, linux-image-unsigned and linux-modules (copy locally, then just 'sudo dpkg -i <deb>').