There are currently no open bugs.

"kwindowsystem" versions published in Ubuntu

Focal (5.68.0-0ubuntu1): universe/libs
Eoan (5.62.0-0ubuntu1): universe/libs
Disco (5.56.0-0ubuntu2): universe/libs
Bionic (5.44.0-0ubuntu1): universe/libs
Xenial (5.18.0-0ubuntu1): universe/libs