CVE-2026-43056 Linux内核mana驱动释放后使用漏洞

/* * Conceptual PoC for CVE-2026-43056 * Demonstrating the logic flaw in the error path. * Note: Actual exploitation requires specific hardware/driver context. */ #include <linux/module.h> #include <linux/auxiliary_bus.h> struct mana_adev { struct auxiliary_device adev; // other fields... }; // Simulating the vulnerable function flow void vulnerable_add_adev(struct mana_adev *ma) { int ret; // Initialization code... // Attempt to add the auxiliary device ret = auxiliary_device_add(&ma->adev); if (ret) { // Error path: add_fail // This calls adev_release() which frees 'ma' auxiliary_device_uninit(&ma->adev); // VULNERABILITY: Use-after-free occurs here // Accessing ma->adev.id after ma was freed pr_err("Device add failed with ID: %d\n", ma->adev.id); goto init_fail; } // Success path... return; init_fail: // Further cleanup... return; }