What is CVE-2021-47112?

CVE-2021-47112 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2021-47112 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47112?

CVE-2021-47112 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47112?

No patch is currently available for CVE-2021-47112. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47112 actively exploited?

CVE-2021-47112 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47112

Medium

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.

Package Linux Kernel

Published 2024-03-15

Last modified 2025-03-13

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

The following references provide additional information about CVE-2021-47112 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54
Patch
Kernel patch commit
https://git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2021-47112

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-03-15

Modified 2025-03-13

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47112?

CVE-2021-47112 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2021-47112 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47112?

CVE-2021-47112 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47112?

No patch is currently available for CVE-2021-47112. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47112 actively exploited?

No — CVE-2021-47112 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.