What is CVE-2021-47534?

CVE-2021-47534 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.1 out of 10, affecting Linux kernel versions from 5.12 onward and patched in 5.15.7 and 5.16. CVE-2021-47534 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47534?

CVE-2021-47534 has a CVSS score of 4.1 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47534?

Yes, CVE-2021-47534 has been patched. Fixed versions include 5.15.7 and 5.16. If you are running Linux kernel 5.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47534 actively exploited?

CVE-2021-47534 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47534

Medium

In the Linux kernel, the following vulnerability has been resolved: drm/vc4: kms: Add missing drm_crtc_commit_put Commit 9ec03d7f1ed3 ("drm/vc4: kms: Wait on previous FIFO users before a commit") introduced a global state for the HVS, with each FIFO storing the current CRTC commit so that we can properly synchronize commits. However, the refcounting was off and we thus ended up leaking the drm_crtc_commit structure every commit. Add a drm_crtc_commit_put to prevent the leakage.

Package Linux Kernel

Published 2024-05-24

Last modified 2025-04-01

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

4.1

out of 10

Medium

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 5.12 and later are affected. Fixed in 5.15.7, 5.16 and their respective stable series.

Affected from

≥ 5.12

Fixed in

✓ 5.15.7 5.15.x ✓ 5.16

References

2 total

Kernel Git
https://git.kernel.org/stable/c/049cfff8d53a30cae3349ff71a4c01b7d9981bc2

Patch
Kernel Git
https://git.kernel.org/stable/c/53f9601e908d42481addd67cdb01a9288c611124

Patch

Details

CVE ID CVE-2021-47534

Severity Medium

CVSS score 4.1 / 10

CVSS version 3.1

Published 2024-05-24

Modified 2025-04-01

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47534?

CVE-2021-47534 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.1 out of 10 . It affects Linux kernel versions from 5.12 onward and has been patched in 5.15.7 and 5.16. CVE-2021-47534 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47534?

CVE-2021-47534 has a CVSS score of 4.1 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47534?

Yes. CVE-2021-47534 has been patched. Fixed versions include 5.15.7 and 5.16. If you are running Linux kernel 5.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47534 actively exploited?

No. CVE-2021-47534 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.