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CVE-2026-90289

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Resize MST HDCP per-connector arrays to 32 AMDGPU_DM_MAX_DISPLAY_INDEX is 31.

Published Sep 17, 2026EPSS 0.17%

Overview

CVE-2026-90289 is a high-severity vulnerability. It was published on September 17, 2026 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: Resize MST HDCP per-connector arrays to 32

AMDGPU_DM_MAX_DISPLAY_INDEX is 31. It suggest a maximum number of

32 connectors. But the way it's used is like MAX_DISPLAY_COUNT.

Hence we're off by one with DRM core, which supports a max of 32

connectors.

Rename AMDGPU_DM_MAX_DISPLAY_INDEX to AMDGPU_DM_MAX_DISPLAY_COUNT

to match its actual use, and increase the size to 32 to match the

originally intended size.

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/0fa116a17b69a28712cdf209318e345b676d7f6cRefgit.kernel.org/stable/c/1c22294c7d9b3b1c26a18ca4eca8c863a5a0d907Refgit.kernel.org/stable/c/261e0fe4e2c99f687114b64b10b98db964b475f4Refgit.kernel.org/stable/c/562d24ac214ba9530d88841088eb6adce5c537b5Refgit.kernel.org/stable/c/ac490fea9fe74f9d9975c5d8250c8719750589cdRefgit.kernel.org/stable/c/decea8279bec5a35413b2cb8e36951cca308fac0

How CyberStrike helps

Frequently asked questions

What is CVE-2026-90289?

CVE-2026-90289 is a high-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-90289?

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-2026-90289?

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-2026-90289?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-90289 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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