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CVE-2025-21985

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix out-of-bound accesses [WHAT & HOW] hpo_stream_to_link_encoder_mapping has size MAX_HPO_DP2_ENCODERS(=4), b…

Published Apr 1, 2025CWE-125EPSS 0.20%

Overview

CVE-2025-21985 is a high-severity vulnerability. It was published on April 1, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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 out-of-bound accesses

[WHAT & HOW]

hpo_stream_to_link_encoder_mapping has size MAX_HPO_DP2_ENCODERS(=4),

but location can have size up to 6. As a result, it is necessary to

check location against MAX_HPO_DP2_ENCODERS.

Similiarly, disp_cfg_stream_location can be used as an array index which

should be 0..5, so the ASSERT's conditions should be less without equal.

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/36793d90d76f667d26c6dd025571481ee0c96abcRefgit.kernel.org/stable/c/8adbb2a98b00926315fd513b5fe2596b5716b82dRefgit.kernel.org/stable/c/9aedc776b11038f04f4641241bb7e877781e4aa4

How CyberStrike helps

Frequently asked questions

What is CVE-2025-21985?

CVE-2025-21985 is a high-severity vulnerability. It was published on April 1, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-21985?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-21985?

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-2025-21985?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-21985 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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