Buffer Overflow in Linux Kernel Affects Nokia 770 Touchscreen Functionality

CVE-2025-21821

Summary

A vulnerability in the Linux kernel can lead to system instability and crashes on the Nokia 770 when utilizing touchscreen and framebuffer functionality. The issue occurs due to improper handling of interrupts, resulting in an error state characterized by a scheduling problem. Users may experience system hangs or reboots under specific conditions, particularly when using the LCD with touch inputs. The recommended fix involves switching to a threaded IRQ, which can help stabilize the system and mitigate these issues. Users should ensure their systems are updated to prevent potential exploitation.

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