I can reproduce this issue on a fresh Leap 15.3 installation. I have no idea why YaST/zypper doesn't list kernel-default-devel 5.3.18-57.3 It's in http://download.opensuse.org/distribution/leap/15.3/repo/oss/x86_64/ kernel-devel is in http://download.opensuse.org/distribution/leap/15.3/repo/oss/noarch/ # zypper repos -u|grep repo-oss 10 | repo-oss | Main Repository | Yes | (r ) Yes | Yes | http://download.opensuse.org/distribution/leap/15.3/repo/oss/ # # zypper packages repo-oss|grep kernel-devel v | Main Repository | kernel-devel | 5.3.18-59.10.1 | noarch | Main Repository | kernel-devel-azure | 5.3.18-38.8.1 | noarch | Main Repository | kernel-devel-rt | 5.3.18-8.13.1 | noarch # zypper packages repo-oss|grep kernel-default-devel v | Main Repository | kernel-default-devel | 5.3.18-59.10.1 | x86_64