DisplayPort Alt Mode Vulnerability in Linux Kernel by Linux Foundation

CVE-2025-38391

What is CVE-2025-38391?

A vulnerability has been identified in the Linux kernel's DisplayPort Alt Mode implementation, where a flawed port partner can incorrectly declare unsupported pin assignments. This misrepresentation can lead to a BRK exception due to out-of-bounds access when the pin_assignment_show function is called. This issue has been addressed by implementing a safeguard that ensures loop conditions are checked against the maximum allowed values, preventing invalid pin assignment access and enhancing system stability.

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