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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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Hyperlink Resource
https://git.kernel.org/stable/c/1df2dc09926f61319116c80ee85701df33577d70
https://git.kernel.org/stable/c/1df2dc09926f61319116c80ee85701df33577d70
https://git.kernel.org/stable/c/3b0becf8b1ecf642a9edaf4c9628ffc641e490d6
https://git.kernel.org/stable/c/3b0becf8b1ecf642a9edaf4c9628ffc641e490d6
https://git.kernel.org/stable/c/9084fe1b3572664ad276f427dce575f580c9799a
https://git.kernel.org/stable/c/9084fe1b3572664ad276f427dce575f580c9799a
https://git.kernel.org/stable/c/c02027b5742b5aa804ef08a4a9db433295533046
https://git.kernel.org/stable/c/c02027b5742b5aa804ef08a4a9db433295533046

Weakness Enumeration

CWE-ID CWE Name Source

Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-47110
NVD Published Date:
03/15/2024
NVD Last Modified:
11/21/2024
Source:
kernel.org