The SUSE Linux Enterprise 15 SP2 kernel was updated to receive various
security and bugfixes.

The following security bugs were fixed:

• CVE-2021-3659: Fixed a NULL pointer dereference in llsec_key_alloc() in
  net/mac802154/llsec.c (bsc#1188876).
• CVE-2021-21781: Fixed a information disclosure vulnerability in the ARM
  SIGPAGE (bsc#1188445).
• CVE-2021-22543: Fixed improper handling of VM_IO|VM_PFNMAP vmas in KVM,
  which could bypass RO checks and can lead to pages being freed while
  still accessible by the VMM and guest. This allowed users with the
  ability to start and control a VM to read/write random pages of memory
  and can result in local privilege escalation (bsc#1186482).
• CVE-2021-37576: Fixed an issue on the powerpc platform, where a KVM
  guest OS user could cause host OS memory corruption via rtas_args.nargs
  (bsc#1188838).

The following non-security bugs were fixed:
https://lists.suse.com/pipermail/sle-security-updates/2021-August/009299.html