CVE-2025-38391 Information

Jul 26, 2025 cve

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.

Reference

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

CNNVD-202507-3217 (Published: 2025-07-25)

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