CVE-2026-31572 Linux内核竞态条件漏洞

/* * PoC for CVE-2026-31572: Race condition in i2c designware amdisp probe * This is a theoretical trigger to demonstrate the condition. * Requires hardware with amdisp i2c device. */ #include <linux/module.h> #include <linux/device.h> static int __init poc_init(void) { // The race is triggered during device probe when runtime PM resumes. // On a vulnerable system, loading the module or hardware initialization // that triggers i2c_dw_probe() while pm_runtime_get_sync() is active // will cause a NULL pointer dereference. printk(KERN_INFO "Triggering device probe sequence for CVE-2026-31572\n"); // In a real exploit scenario, specific hardware interaction or // forcing a rescan of the i2c bus would be necessary to invoke the path. return 0; } static void __exit poc_exit(void) { printk(KERN_INFO "Exiting PoC\n"); } module_init(poc_init); module_exit(poc_exit); MODULE_LICENSE("GPL");