CVE-2025-38391

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

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.

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/c93bc959788ed9a1af7df57cb539837bdf790cee
https://git.kernel.org/stable/c/114a977e0f6bf278e05eade055e13fc271f69cf7
https://git.kernel.org/stable/c/621d5a3ef0231ab242f2d31eecec40c38ca609c5
https://git.kernel.org/stable/c/2f535517b5611b7221ed478527e4b58e29536ddf
https://git.kernel.org/stable/c/45e9444b3b97eaf51a5024f1fea92f44f39b50c6
https://git.kernel.org/stable/c/5581e694d3a1c2f32c5a51d745c55b107644e1f8
https://git.kernel.org/stable/c/47cb5d26f61d80c805d7de4106451153779297a1
https://git.kernel.org/stable/c/af4db5a35a4ef7a68046883bfd12468007db38f1

Frequently Asked Questions

What is the severity of CVE-2025-38391?: CVE-2025-38391 has not yet been assigned a CVSS score.
How to fix CVE-2025-38391?: To fix CVE-2025-38391, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-38391 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-38391 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-38391?: CVE-2025-38391 affects Linux Linux, Linux Linux.

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