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CVE-2021-47348

9.1 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Avoid HDCP over-read and corruption Instead of reading the desired 5 bytes of the actual target field, the cod…

Published May 21, 2024CWE-119EPSS 0.99%

Overview

CVE-2021-47348 is a critical-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Avoid HDCP over-read and corruption

Instead of reading the desired 5 bytes of the actual target field,

the code was reading 8. This could result in a corrupted value if the

trailing 3 bytes were non-zero, so instead use an appropriately sized

and zero-initialized bounce buffer, and read only 5 bytes before casting

to u64.

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/06888d571b513cbfc0b41949948def6cb81021b2Refgit.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172fRefgit.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639fRefgit.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2eRefgit.kernel.org/stable/c/06888d571b513cbfc0b41949948def6cb81021b2Refgit.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172fRefgit.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639fRefgit.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47348?

CVE-2021-47348 is a critical-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2021-47348?

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-47348?

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-2021-47348?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47348 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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