apparmor side there are 2 immediate suspects.
1. kernel 0191e8433f76 UBUNTU: SAUCE: apparmor4.0.0: apparmor: Fix regression in mount mediation
2. userspace mount work to fix the mount CVE https://bugs.launchpad.net/apparmor/+bug/1597017
https://gitlab.com/apparmor/apparmor/-/merge_requests/1054
https://gitlab.com/apparmor/apparmor/-/merge_requests/333
I doubt #2 as this has been in the apparmor userspace in mantic since before FF.
apparmor side there are 2 immediate suspects.
1. kernel
0191e8433f76 UBUNTU: SAUCE: apparmor4.0.0: apparmor: Fix regression in mount mediation
2. userspace mount work to fix the mount CVE https:/ /bugs.launchpad .net/apparmor/ +bug/1597017
https:/ /gitlab. com/apparmor/ apparmor/ -/merge_ requests/ 1054
https:/ /gitlab. com/apparmor/ apparmor/ -/merge_ requests/ 333
I doubt #2 as this has been in the apparmor userspace in mantic since before FF.