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CVE-2021-47534

4.1 · 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")…

Published May 24, 2024EPSS 0.18%

Overview

CVE-2021-47534 is a medium-severity vulnerability. It was published on May 24, 2024 and has a CVSS 3.1 base score of 4.1 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.1, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/049cfff8d53a30cae3349ff71a4c01b7d9981bc2Refgit.kernel.org/stable/c/53f9601e908d42481addd67cdb01a9288c611124Refgit.kernel.org/stable/c/049cfff8d53a30cae3349ff71a4c01b7d9981bc2Refgit.kernel.org/stable/c/53f9601e908d42481addd67cdb01a9288c611124

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47534?

CVE-2021-47534 is a medium-severity vulnerability. It was published on May 24, 2024 and has a CVSS 3.1 base score of 4.1 (MEDIUM).

How severe is CVE-2021-47534?

This vulnerability has a CVSS 3.1 base score of 4.1, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47534?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-47534?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47534 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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