Lenovo has “quietely” released another firmware (1.46) for ThinkPad X1 Carbon Gen 6.

Changes in this release:

CHANGES IN THIS RELEASE
  Version 1.46

[Important updates]
- Update includes a security fix.

[New functions or enhancements]
  Nothing.

[Problem fixes]
  Nothing.

I am not able to find out what the “important security fix” is. However, I’m happy to report that the firmware update went well on X1 Carbon Gen 6 running Fedora 31.

The update process is pretty simple:

# fwupdmgr refresh
# fwupdmgr update

References: