The SUSE Linux Enterprise 15 kernel was updated to receive various security and bugfixes. The following security bugs were fixed: - CVE-2021-26930: Fixed an improper error handling in blkback"s grant mapping . - CVE-2021-26931: Fixed an issue where Linux kernel was treating grant mapping errors as bugs . - CVE-2021-26932: Fixed improper error handling issues in Linux grant mapping . by remote attackers to read or write files via directory traversal in an XCOPY request . - CVE-2020-29368,CVE-2020-29374: Fixed an issue in copy-on-write implementation which could have granted unintended write access because of a race condition in a THP mapcount check . The following non-security bugs were fixed: - kernel-{binary,source}.spec.in: do not create loop symlinks - kernel-source.spec: Fix build with rpm 4.16 . - rpm/kernel-binary.spec.in: avoid using barewords - rpm/kernel-binary.spec.in: avoid using more barewords %split_extra still contained two. - rpm/kernel-binary.spec.in: Fix compressed module handling for in-tree KMP The in-tree KMP that is built with SLE kernels have a different scriptlet that is embedded in kernel-binary.spec.in rather than *.sh files. - rpm/kernel-binary.spec.in: use grep -E instead of egrep egrep is only a deprecated bash wrapper for quot;grep -Equot;. So use the latter instead. - rpm/kernel-module-subpackage: make Group tag optional - rpm/kernel-obs-build.spec.in: Add -q option to modprobe calls - rpm/kernel-{source,binary}.spec: do not include ghost symlinks . - rpm/mkspec: do not build kernel-obs-build on x86_32 We want to use 64bit kernel due to various bugs . - rpm/post.sh: Avoid purge-kernel for the first installed kernel - xen/netback: avoid race in xenvif_rx_ring_slots_available . - xen/netback: fix spurious event detection for common event case . Special Instructions and Notes: Please reboot the system after installing this update.