What is CVE-2021-47110?

CVE-2021-47110 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, affecting Linux kernel versions from 2.6.26 onward and patched in 5.4.125, 5.10.43, 5.12.10 and others. CVE-2021-47110 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47110?

CVE-2021-47110 has a CVSS score of 7.1 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Is there a patch available for CVE-2021-47110?

Yes, CVE-2021-47110 has been patched. Fixed versions include 5.4.125, 5.10.43, 5.12.10 and others. If you are running Linux kernel 2.6.26 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47110 actively exploited?

CVE-2021-47110 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47110

High

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.

Package Linux Kernel

Published 2024-03-15

Last modified 2025-03-13

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.1

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-459

CVE-2021-47110 is classified as CWE-459

See CWE-459 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 2.6.26 and later are affected. Fixed in 5.4.125, 5.10.43, 5.12.10, 5.13 and their respective stable series.

Affected from

≥ 2.6.26

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/1df2dc09926f61319116c80ee85701df33577d70

Patch
Kernel Git
https://git.kernel.org/stable/c/3b0becf8b1ecf642a9edaf4c9628ffc641e490d6

Patch
Kernel Git
https://git.kernel.org/stable/c/9084fe1b3572664ad276f427dce575f580c9799a

Patch
Kernel Git
https://git.kernel.org/stable/c/c02027b5742b5aa804ef08a4a9db433295533046

Patch

Details

CVE ID CVE-2021-47110

Severity High

CVSS score 7.1 / 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-2021-47110?

CVE-2021-47110 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 . It affects Linux kernel versions from 2.6.26 onward and has been patched in 5.4.125, 5.10.43, 5.12.10 and others. CVE-2021-47110 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47110?

CVE-2021-47110 has a CVSS score of 7.1 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.
Is there a patch available for CVE-2021-47110?

Yes. CVE-2021-47110 has been patched. Fixed versions include 5.4.125, 5.10.43, 5.12.10 and others. If you are running Linux kernel 2.6.26 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47110 actively exploited?

No. CVE-2021-47110 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.