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, affecting Linux kernel versions from 2.6.38 onward and patched in 5.4.125, 5.10.43, 5.12.10 and others. 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?

Yes, CVE-2021-47112 has been patched. Fixed versions include 5.4.125, 5.10.43, 5.12.10 and others. If you are running Linux kernel 2.6.38 or later up to the fix versions, apply the relevant patch for your kernel branch.

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

Yes

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

Affected versions

Linux kernel versions 2.6.38 and later are affected. Fixed in 5.4.125, 5.10.43, 5.12.10, 5.13 and their respective stable series.

Affected from

≥ 2.6.38

Fixed in

✓ 5.4.125 5.4.x ✓ 5.10.43 5.10.x ✓ 5.12.10 5.12.x ✓ 5.13

References

4 total

Kernel Git
https://git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2

Patch
Kernel Git
https://git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54

Patch
Kernel Git
https://git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4

Patch
Kernel Git
https://git.kernel.org/stable/c/d1629b5b925de9b27979e929dae7fcb766daf6b6

Patch

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

Yes

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 . It affects Linux kernel versions from 2.6.38 onward and has been patched in 5.4.125, 5.10.43, 5.12.10 and others. 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?

Yes. CVE-2021-47112 has been patched. Fixed versions include 5.4.125, 5.10.43, 5.12.10 and others. If you are running Linux kernel 2.6.38 or later up to the fix versions, apply the relevant patch for your kernel branch.
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.