Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.19, < 5.4.296 |
| Debian | Debian Linux | 11.0 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/114a977e0f6bf278e05eade055e13fc271f69cf7Patch
- https://git.kernel.org/stable/c/2f535517b5611b7221ed478527e4b58e29536ddfPatch
- https://git.kernel.org/stable/c/45e9444b3b97eaf51a5024f1fea92f44f39b50c6Patch
- https://git.kernel.org/stable/c/47cb5d26f61d80c805d7de4106451153779297a1Patch
- https://git.kernel.org/stable/c/5581e694d3a1c2f32c5a51d745c55b107644e1f8Patch
- https://git.kernel.org/stable/c/621d5a3ef0231ab242f2d31eecec40c38ca609c5Patch
- https://git.kernel.org/stable/c/af4db5a35a4ef7a68046883bfd12468007db38f1Patch
- https://git.kernel.org/stable/c/c93bc959788ed9a1af7df57cb539837bdf790ceePatch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory
FAQ
What is CVE-2025-38391?
CVE-2025-38391 is a vulnerability with a CVSS score of 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 can ...
How severe is CVE-2025-38391?
CVE-2025-38391 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-38391?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux.