What is CVE-2021-47006?

CVE-2021-47006 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 4.7 onward and patched in 4.9.269, 4.14.233, 4.19.191 and others. CVE-2021-47006 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47006?

CVE-2021-47006 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-2021-47006?

Yes, CVE-2021-47006 has been patched. Fixed versions include 4.9.269, 4.14.233, 4.19.191 and others. If you are running Linux kernel 4.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47006 actively exploited?

CVE-2021-47006 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47006

Medium

In the Linux kernel, the following vulnerability has been resolved: ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook The commit 1879445dfa7b ("perf/core: Set event's default ::overflow_handler()") set a default event->overflow_handler in perf_event_alloc(), and replace the check event->overflow_handler with is_default_overflow_handler(), but one is missing. Currently, the bp->overflow_handler can not be NULL. As a result, enable_single_step() is always not invoked. Comments from Zhen Lei: https://patchwork.kernel.org/project/linux-arm-kernel/patch/[email protected]/

Package Linux Kernel

Published 2024-02-28

Last modified 2025-03-19

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 4.7 and later are affected. Fixed in 4.9.269, 4.14.233, 4.19.191, 5.4.120, 5.10.38, 5.11.22, 5.12.5, 5.13 and their respective stable series.

Affected from

≥ 4.7

Fixed in

✓ 4.9.269 4.9.x ✓ 4.14.233 4.14.x ✓ 4.19.191 4.19.x ✓ 5.4.120 5.4.x ✓ 5.10.38 5.10.x ✓ 5.11.22 5.11.x ✓ 5.12.5 5.12.x ✓ 5.13

References

8 total

Kernel Git
https://git.kernel.org/stable/c/3ed8832aeaa9a37b0fc386bb72ff604352567c80

Patch
Kernel Git
https://git.kernel.org/stable/c/555a70f7fff03bd669123487905c47ae27dbdaac

Patch
Kernel Git
https://git.kernel.org/stable/c/630146203108bf6b8934eec0dfdb3e46dcb917de

Patch
Kernel Git
https://git.kernel.org/stable/c/7eeacc6728c5478e3c01bc82a1f08958eaa12366

Patch
Kernel Git
https://git.kernel.org/stable/c/a506bd5756290821a4314f502b4bafc2afcf5260

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2021-47006

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-02-28

Modified 2025-03-19

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47006?

CVE-2021-47006 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 4.7 onward and has been patched in 4.9.269, 4.14.233, 4.19.191 and others. CVE-2021-47006 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47006?

CVE-2021-47006 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-2021-47006?

Yes. CVE-2021-47006 has been patched. Fixed versions include 4.9.269, 4.14.233, 4.19.191 and others. If you are running Linux kernel 4.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47006 actively exploited?

No. CVE-2021-47006 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.