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CVE-2021-47253

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix potential memory leak in DMUB hw_init [Why] On resume we perform DMUB hw_init which allocates memory: dm_r…

Published May 21, 2024CWE-401EPSS 0.22%

Overview

CVE-2021-47253 is a medium-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, 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/amd/display: Fix potential memory leak in DMUB hw_init

[Why]

On resume we perform DMUB hw_init which allocates memory:

dm_resume->dm_dmub_hw_init->dc_dmub_srv_create->kzalloc

That results in memory leak in suspend/resume scenarios.

[How]

Allocate memory for the DC wrapper to DMUB only if it was not

allocated before.

No need to reallocate it on suspend/resume.

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/9e8c2af010463197315fa54a6c17e74988b5259cRefgit.kernel.org/stable/c/aa000f828e60ac15d6340f606ec4a673966f5b0bRefgit.kernel.org/stable/c/c5699e2d863f58221044efdc3fa712dd32d55cdeRefgit.kernel.org/stable/c/9e8c2af010463197315fa54a6c17e74988b5259cRefgit.kernel.org/stable/c/aa000f828e60ac15d6340f606ec4a673966f5b0bRefgit.kernel.org/stable/c/c5699e2d863f58221044efdc3fa712dd32d55cde

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47253?

CVE-2021-47253 is a medium-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47253?

This vulnerability has a CVSS 3.1 base score of 5.5, 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-2021-47253?

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-2021-47253?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47253 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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