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CVE-2025-38391

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: usb: typec: altmodes/displayport: do not index invalid pin_assignments A poorly implemented DisplayPort Alt Mode port partner c…

Published Jul 25, 2025CWE-125EPSS 0.19%

Overview

CVE-2025-38391 is a medium-severity vulnerability. It was published on July 25, 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:

usb: typec: altmodes/displayport: do not index invalid pin_assignments

A poorly implemented DisplayPort Alt Mode port partner can indicate

that its pin assignment capabilities are greater than the maximum

value, DP_PIN_ASSIGN_F. In this case, calls to pin_assignment_show

will cause a BRK exception due to an out of bounds array access.

Prevent for loop in pin_assignment_show from accessing

invalid values in pin_assignments by adding DP_PIN_ASSIGN_MAX

value in typec_dp.h and using i < DP_PIN_ASSIGN_MAX as a loop

condition.

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/114a977e0f6bf278e05eade055e13fc271f69cf7Refgit.kernel.org/stable/c/2f535517b5611b7221ed478527e4b58e29536ddfRefgit.kernel.org/stable/c/45e9444b3b97eaf51a5024f1fea92f44f39b50c6Refgit.kernel.org/stable/c/47cb5d26f61d80c805d7de4106451153779297a1Refgit.kernel.org/stable/c/5581e694d3a1c2f32c5a51d745c55b107644e1f8Refgit.kernel.org/stable/c/621d5a3ef0231ab242f2d31eecec40c38ca609c5Refgit.kernel.org/stable/c/af4db5a35a4ef7a68046883bfd12468007db38f1Refgit.kernel.org/stable/c/c93bc959788ed9a1af7df57cb539837bdf790ceeReflists.debian.org/debian-lts-announce/2025/10/msg00007.htmlReflists.debian.org/debian-lts-announce/2025/10/msg00008.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38391?

CVE-2025-38391 is a medium-severity vulnerability. It was published on July 25, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-38391?

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-2025-38391?

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-2025-38391?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38391 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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