Resolve KernelCare `Error unpatching [255] ('default', '', '', False)` issue

Jun 28, 2022 · 1 min read · Post a comment

Updating the latest security and stability patches using KernelCare it’s a safe and recommended way, but sometimes it can throw Error unpatching [255] ('default', '', '', False) error during the update. This error can appear due to stuck processes. Here I’m going to show you how to resolve it quickly.


  • KernelCare
  • sudo privileges


To resolve the error you must open the terminal and execute the update command manually with some extra parameters.

kcarectl --update --freezer=smart

The only part of the command that might be unclear to you.

  • freezer: Freezes the processes.
  • smart: Will freeze only threads that need to be frozen for patching.


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