What is CVE-2021-47659?

CVE-2021-47659 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 4.14 onward and patched in 4.19.247, 5.4.198, 5.10.121 and others. CVE-2021-47659 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47659?

CVE-2021-47659 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-2021-47659?

Yes, CVE-2021-47659 has been patched. Fixed versions include 4.19.247, 5.4.198, 5.10.121 and others. If you are running Linux kernel 4.14 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47659 actively exploited?

CVE-2021-47659 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47659

Medium

In the Linux kernel, the following vulnerability has been resolved: drm/plane: Move range check for format_count earlier While the check for format_count > 64 in __drm_universal_plane_init() shouldn't be hit (it's a WARN_ON), in its current position it will then leak the plane->format_types array and fail to call drm_mode_object_unregister() leaking the modeset identifier. Move it to the start of the function to avoid allocating those resources in the first place.

Package Linux Kernel

Published 2025-02-26

Last modified 2025-10-14

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 4.14 and later are affected. Fixed in 4.19.247, 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.19 and their respective stable series.

Affected from

≥ 4.14

Fixed in

✓ 4.19.247 4.19.x ✓ 5.4.198 5.4.x ✓ 5.10.121 5.10.x ✓ 5.15.46 5.15.x ✓ 5.17.14 5.17.x ✓ 5.18.3 5.18.x ✓ 5.19

References

The following references provide additional information about CVE-2021-47659 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/1e29d829ad51d1472dd035487953a6724b56fc33
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4ab7e453a3ee88c274cf97bee9487ab92a66d313
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4b674dd69701c2e22e8e7770c1706a69f3b17269
Patch

7 patch commits total View all on NVD

Details

CVE ID CVE-2021-47659

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-02-26

Modified 2025-10-14

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47659?

CVE-2021-47659 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 4.14 onward and has been patched in 4.19.247, 5.4.198, 5.10.121 and others. CVE-2021-47659 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47659?

CVE-2021-47659 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-2021-47659?

Yes — CVE-2021-47659 has been patched. Fixed versions include 4.19.247, 5.4.198, 5.10.121 and others. If you are running Linux kernel 4.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47659 actively exploited?

No — CVE-2021-47659 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.