CVE-2026-31460 Linux内核AMD驱动空指针漏洞

/* * Conceptual PoC for CVE-2026-31460 * This C code demonstrates the vulnerable pattern where a pointer * is dereferenced without a NULL check. */ #include <stdio.h> #include <stdlib.h> // Simulating the kernel structure typedef struct { int caps; } ext_backlight_caps; // Vulnerable function simulation void setup_backlight(ext_backlight_caps *ext_caps) { // VULNERABILITY: No check if ext_caps is valid (non-NULL) // In the kernel, this causes a Kernel Panic/Oops printf("Caps value: %d\n", ext_caps->caps); } int main() { // LVDS connectors don't have extended caps, so pointer is NULL ext_backlight_caps *lvds_ptr = NULL; printf("Triggering vulnerability for LVDS connector...\n"); setup_backlight(lvds_ptr); return 0; }