CVE-2026-43352 Linux内核I3C驱动DMA中止处理漏洞

/* * Conceptual PoC for CVE-2026-43352 * Triggering the RING_CTRL_ABORT logic flaw in i3c: mipi-i3c-hci */ #include <linux/module.h> #include <linux/i3c/master.h> static int __init trigger_poc(void) { // In a real exploit scenario, this module would interact with // the I3C HCI device to force the DMA ring into a state // where the abort logic is triggered erroneously. // This involves sending specific I3C commands that cause // the DMA dequeue path to execute. // Trigger condition: Call abort on a stopped ring or rely on // uninitialized completion to cause a hang/crash. printk(KERN_ALERT "CVE-2026-43352: Triggering I3C HCI DMA abort flaw\n"); // Exploit logic would go here to manipulate Ring Control registers // and observe the incorrect clearing of RING_CTRL_ENABLE. return 0; } static void __exit exit_poc(void) { printk(KERN_ALERT "CVE-2026-43352: Unloading module\n"); } module_init(trigger_poc); module_exit(exit_poc); MODULE_LICENSE("GPL");