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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-47110 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Disable kvmclock on all CPUs on shutdown Currenly, we disable kvmclock from machine_shutdown() hook and this only happens for boot CPU. We need to disable it for all CPUs to guard against memory corruption e.g. on restore from hibernate. Note, writing '0' to kvmclock MSR doesn't clear memory location, it just prevents hypervisor from updating the location so for the short while after write and while CPU is still alive, the clock remains usable and correct so we don't need to switch to some other clocksource.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/1df2dc09926f61319116c80ee85701df33577d70 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/3b0becf8b1ecf642a9edaf4c9628ffc641e490d6 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/9084fe1b3572664ad276f427dce575f580c9799a CVE, kernel.org Patch 
https://git.kernel.org/stable/c/c02027b5742b5aa804ef08a4a9db433295533046 CVE, kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-459 Incomplete Cleanup cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-47110
NVD Published Date:
03/15/2024
NVD Last Modified:
03/13/2025
Source:
kernel.org