Fedora 28 : libvirt (2018-527698a904) (Spectre)
Medium Nessus Plugin ID 120426
SynopsisThe remote Fedora host is missing a security update.
DescriptionAdd new CPU features for speculative store bypass (CVE-2018-3639)
On Intel x86 hosts, the 'ssbd' feature must be explicitly added to any virtual machines that are not using host-passthrough/host-model CPU setup. NB this requires new microcode too, which is not yet available in Fedora microcode_ctl RPMs.
On AMD x86 hosts, the 'virt-ssbd' feature must be explicitly added to any virtual machines that are not using host-passthrough/host-model CPU setup. There is no microcode dependency for AMD as this is a virtualized CPUID feature.
In both cases, kernel >= 4.16.10-301 is required on the host and guest in order to activate the fix.
QEMU >= qemu-2.11.1-3.fc28 is also required on the host
Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpdate the affected libvirt package.