What is CVE-2021-47063?

CVE-2021-47063 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 4.13 onward and patched in 5.10.37, 5.11.21, 5.12.4 and others. CVE-2021-47063 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47063?

CVE-2021-47063 has a CVSS score of 7.8 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:H/A:H.

Is there a patch available for CVE-2021-47063?

Yes, CVE-2021-47063 has been patched. Fixed versions include 5.10.37, 5.11.21, 5.12.4 and others. If you are running Linux kernel 4.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47063 actively exploited?

CVE-2021-47063 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2021-47063

High

In the Linux kernel, the following vulnerability has been resolved: drm: bridge/panel: Cleanup connector on bridge detach If we don't call drm_connector_cleanup() manually in panel_bridge_detach(), the connector will be cleaned up with the other DRM objects in the call to drm_mode_config_cleanup(). However, since our drm_connector is devm-allocated, by the time drm_mode_config_cleanup() will be called, our connector will be long gone. Therefore, the connector must be cleaned up when the bridge is detached to avoid use-after-free conditions. v2: Cleanup connector only if it was created v3: Add FIXME v4: (Use connector->dev) directly in if() block

Package Linux Kernel

Published 2024-02-29

Last modified 2024-12-10

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2021-47063 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.13 and later are affected. Fixed in 5.10.37, 5.11.21, 5.12.4, 5.13 and their respective stable series.

Affected from

≥ 4.13

Fixed in

✓ 5.10.37 5.10.x ✓ 5.11.21 5.11.x ✓ 5.12.4 5.12.x ✓ 5.13

References

4 total

Kernel Git
https://git.kernel.org/stable/c/18149b420c9bd93c443e8d1f48a063d71d9f6aa1

Patch
Kernel Git
https://git.kernel.org/stable/c/4d906839d321c2efbf3fed4bc31ffd9ff55b75c0

Patch
Kernel Git
https://git.kernel.org/stable/c/98d7d76a74e48ec3ddf2e23950adff7edcab9327

Patch
Kernel Git
https://git.kernel.org/stable/c/ce450934a00cf896e648fde08d0bd1426653d7a2

Patch

Details

CVE ID CVE-2021-47063

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-02-29

Modified 2024-12-10

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47063?

CVE-2021-47063 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 4.13 onward and has been patched in 5.10.37, 5.11.21, 5.12.4 and others. CVE-2021-47063 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47063?

CVE-2021-47063 has a CVSS score of 7.8 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:H/A:H.
Is there a patch available for CVE-2021-47063?

Yes. CVE-2021-47063 has been patched. Fixed versions include 5.10.37, 5.11.21, 5.12.4 and others. If you are running Linux kernel 4.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47063 actively exploited?

No. CVE-2021-47063 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.