The kvm_vm_ioctl_check_extension function in arch/powerpc/kvm/powerpc.c in the Linux kernel before 4.13.11 allows local users to cause a denial of service (NULL pointer dereference and system crash) via a KVM_CHECK_EXTENSION KVM_CAP_PPC_HTM ioctl call to /dev/kvm.
3.11.0-12.194.13.0-16.194.13.0-17.204.13.0-25.295.13.0-19.195.3.0-18.195.3.0-24.265.4.0-9.124.2.0-16.194.2.0-17.214.2.0-19.234.3.0-1.104.3.0-2.114.3.0-5.164.3.0-6.174.3.0-7.184.4.0-2.166.5.0-9.94.4.0-1001.105.3.0-1003.35.3.0-1008.95.3.0-1009.105.3.0-1010.115.4.0-1005.54.4.0-1002.24.15.0-1001.1Exploitability
AV:LAC:LPR:LUI:NScope
S:UImpact
C:NI:NA:HCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H