We expect to have a usable PV-in-HVM shim within the next couple of days to patch meltdown, at which time we will ask all PV users to reboot their domains. We will send an email when this is ready. Customers who wish to convert to HVM or provision a new HVM VPS instead should write support.

For Spectre variant 2 we are still waiting on patches from Xen, and for many CPUs we are still waiting on microcode updates. Our best estimate for when everything may be ready is the weekend of the 20th, but we have little confidence that every single microcode update will be available by then. If we are able to patch some but not all hosts, we will patch the hosts we can.

PV VPS kernels are not affected by meltdown, and most updates so far apply to meltdown only.

The following distributions have released updates and we’ve tested whether they boot:

  • CentOS 6 2.6.32-696.18.7.el6.x86_64 - This works for HVM but not PV. If your VPS is in PV mode, modify “default” in /boot/grub/menu.lst to avoid this kernel. Please contact support if you wish to have your service migrated to HVM in advance of the bug being fixed.
  • CentOS 7 3.10.0-693.11.6.el7.centos.plus.x86_64 - this works for HVM but not PV. If your VPS is in PV mode, modify grub.cfg or menu.lst to avoid this kernel. Please contact support if you wish to have your service migrated to HVM in advance of the bug being fixed.
  • Debian 7 Wheezy 64-bit - 3.2.96-3
  • Debian 8 Jessie 64-bit - 3.16.51-3+deb8u1
  • Debian 9 Stretch 64-bit - 4.9.65-3+deb9u2
  • Fedora 26 64-bit - 4.14.11

The following distributions have released updates but we have not had a chance to test every version on both PV and HVM:

The following distributions do not have updates yet as of 2018-01-05 8:30 UTC:

We have not yet updated any of our distribution images, but we are working on testing them. Updates to the kernel can always be applied via your distributions usual update mechanism.