CVE-2026-43415: Linux内核UFS驱动竞态漏洞

/* * PoC Concept for CVE-2026-43415 * This code demonstrates the logic flaw in the UFS suspend path. * Actual exploitation requires triggering system suspend on vulnerable hardware. */ #include <linux/module.h> #include <linux/workqueue.h> // Simulating the vulnerable race condition logic void vulnerable_suspend_logic(struct device *dev) { // Vulnerability: Cancel work is called AFTER suspend ops // 1. Execute suspend operations (clock gating) // ufshcd_vops_suspend(hba, pm_op, POST_CHANGE); printk(KERN_INFO "Suspending device and gating clocks...\n"); // 2. Race window exists here where rtc_work might fire // 3. Cancel work (Too late!) // cancel_delayed_work_sync(&hba->rtc_work); printk(KERN_INFO "Cancelling delayed work...\n"); } void fixed_suspend_logic(struct device *dev) { // Fix: Cancel work BEFORE suspend ops // 1. Cancel work first // cancel_delayed_work_sync(&hba->rtc_work); printk(KERN_INFO "Cancelling delayed work...\n"); // 2. Execute suspend operations safely // ufshcd_vops_suspend(hba, pm_op, POST_CHANGE); printk(KERN_INFO "Suspending device and gating clocks...\n"); } // In a real scenario, triggering this requires: // echo mem > /sys/power/state or similar PM interactions.