CVE-2021-47112

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue concerns the Linux kernel, where various PV features (Async PF, PV EOI, steal time) work through memory shared with the hypervisor. When restoring from hibernation, these features must be properly torn down to prevent the hypervisor from writing to stale locations after jumping to the previously hibernated kernel. The job is already done for secondary CPUs by kvm cpu down prepare(), and syscore ops are registered to do the same for the boot CPU.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.