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CVE-2025-39675

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add null pointer check in mod_hdcp_hdcp1_create_session() The function mod_hdcp_hdcp1_create_session() calls t…

Published Sep 5, 2025CWE-476EPSS 0.16%

Overview

CVE-2025-39675 is a medium-severity vulnerability. It was published on September 5, 2025 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: Add null pointer check in mod_hdcp_hdcp1_create_session()

The function mod_hdcp_hdcp1_create_session() calls the function

get_first_active_display(), but does not check its return value.

The return value is a null pointer if the display list is empty.

This will lead to a null pointer dereference.

Add a null pointer check for get_first_active_display() and return

MOD_HDCP_STATUS_DISPLAY_NOT_FOUND if the function return null.

This is similar to the commit c3e9826a2202

("drm/amd/display: Add null pointer check for get_first_active_display()").

(cherry picked from commit 5e43eb3cd731649c4f8b9134f857be62a416c893)

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/2af45aadb7b5d3852c76e2d1e985289ada6f48bfRefgit.kernel.org/stable/c/2ee86b764c54e0d6a5464fb023b630fdf20869cdRefgit.kernel.org/stable/c/7a2ca2ea64b1b63c8baa94a8f5deb70b2248d119Refgit.kernel.org/stable/c/857b8387a9777e42b36e0400be99b54c251eaf9aRefgit.kernel.org/stable/c/97fc94c5fd3c6ac5a13e457d38ee247737b8c4bdRefgit.kernel.org/stable/c/ee0373b20bb67b1f00a1b25ccd24c8ac996b6446Reflists.debian.org/debian-lts-announce/2025/10/msg00008.htmlRefcert-portal.siemens.com/productcert/html/ssa-032379.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-39675?

CVE-2025-39675 is a medium-severity vulnerability. It was published on September 5, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-39675?

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-2025-39675?

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-2025-39675?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-39675 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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