LinuxPatchExtension missing from machine, cannot be installed due to administrative block

[gilbahat]

Describe the bug
LinuxPatchExtension missing from machine and uninstallable

To Reproduce
Steps to reproduce the behavior:
No idea, this is not supposed to be possible and recovery is explicitly blocked by Azure

Expected behavior
LinuxPatchExtension is present on machine

Screenshots

/var/log/azure# ls -l

total 16
drwxr-xr-x 3 root root 4096 Sep 16 20:26 Microsoft.Azure.ActiveDirectory.AADSSHLoginForLinux
drwxr-xr-x 3 root root 4096 Nov 21 10:13 Microsoft.Azure.Monitor.AzureMonitorLinuxAgent
drwxr-xr-x 3 root root 4096 Sep 16 20:26 Microsoft.ManagedServices.ApplicationHealthLinux
drwxr-xr-x 2 root root 4096 Sep 16 20:26 applicationhealth-extension

azure explicitly blocking a fix:

az vm extension set --publisher Microsoft.CPlat.Core --name LinuxPatchExtension --resource-group redacted --vm-name redacted

(OperationNotAllowed) Publisher 'Microsoft.CPlat.Core' and type LinuxPatchExtension is reserved for internal use.
Code: OperationNotAllowed
Message: Publisher 'Microsoft.CPlat.Core' and type LinuxPatchExtension is reserved for internal use.

Desktop (please complete the following information):

• OS: Ubuntu 24.04 arm64

Additional context
Add any other context about the problem here.

[gilbahat]

Making things worse than already is - if I try to manually place the extension in the /var/lib/waagent directory, waagent removes it:

Nov 21 10:49:15 dev-staging-hasura python3[2085]: 2024-11-21T10:49:15.595204Z INFO ExtHandler [Microsoft.CPlat.Core.LinuxPatchExtension-1.6.55] Remove extension handler directory: /var/lib/waagent/Microsoft.CPlat.Core.LinuxPatchExtension-1.6.55
Nov 21 10:49:15 dev-staging-hasura python3[2085]: 2024-11-21T10:49:15.596232Z INFO ExtHandler [Microsoft.CPlat.Core.LinuxPatchExtension-1.6.55] Remove the extension slice: Microsoft.CPlat.Core.LinuxPatchExtension-1.6.55

I have no idea why it would do that, nor have I ever configured anything to explicitly stop this machine from using azure update manager.