[UEFI dbx] does not currently allow updates: Not enough efivarfs space

Hello! Just trying to update my system but it fails with this error. I searched in different forums but I wasn’t able to actually have a valid solution (hopefully there is one). Can you please help? Thanks

Maybe try a firmware update or reset/clear secure boot keys.

tried firmware update but didn’t work. I’m not sure how to clear secure boot keys without making some stupid mistake. Is there any guide for it?

Probably an issue similar to this: LVFS Triaged Issue: dbx efivarfs IO error · fwupd/fwupd Wiki · GitHub
As Leigh mentioned, resetting Secure Boot may work. You could first try turning Secure Boot off and back on in your motherboard’s BIOS settings. If that doesn’t work, then the most common suggestion for this issue is to reset your BIOS settings to defaults, as documented in the link above. Just remember to restore any custom settings after (if any.)

If you have a NVIDIA GPU, keep in mind you will need to re-enroll the Secure Boot key, or your NVIDIA driver will not load after the reset, if you use the NVIDIA driver.

The exact steps will differ slightly between different motherboard/system vendors, but it should be pretty straightforward if you go to the BIOS settings and explore the menus a bit.

I managed to solve it doing the following:

  1. Disable secure boot
  2. Manually updating bios firmware (not supported via fwupdmgr)
  3. re enable secure boot
  4. login & make the update.

Maybe this could help someone. Thank for the help!