In the Linux kernel, the following vulnerability has been...
Unreviewed
Published
Mar 15, 2024
to the GitHub Advisory Database
•
Updated Mar 15, 2024
Description
Published by the National Vulnerability Database
Mar 15, 2024
Published to the GitHub Advisory Database
Mar 15, 2024
Last updated
Mar 15, 2024
In the Linux kernel, the following vulnerability has been resolved:
x86/kvm: Teardown PV features on boot CPU as well
Various PV features (Async PF, PV EOI, steal time) work through memory
shared with hypervisor and when we restore from hibernation we must
properly teardown all these features to make sure hypervisor doesn't
write to stale locations after we jump to the previously hibernated kernel
(which can try to place anything there). For secondary CPUs the job is
already done by kvm_cpu_down_prepare(), register syscore ops to do
the same for boot CPU.
References