CVE-2026-23431 Linux内核内存泄漏漏洞

/* * PoC Concept: Demonstrating the memory leak logic. * This is a simplified representation of the vulnerability. */ #include <linux/module.h> #include <linux/spi/spi.h> // Simulated vulnerable function structure static int vulnerable_probe(struct platform_device *pdev) { struct spi_controller *ctlr; // Allocation happens ctlr = spi_alloc_host(&pdev->dev, sizeof(struct spi_controller)); if (!ctlr) return -ENOMEM; // Simulate an error condition after allocation if (some_error_condition()) { // VULNERABILITY: Missing spi_controller_put(ctlr) here return -ENODEV; // Memory leaked } spi_controller_put(ctlr); // Correct path return 0; } /* * To exploit this on a real system, one would need to * trigger the amlogic-spisg driver to load and fail repeatedly, * monitoring kernel memory usage (e.g., via /proc/meminfo). */