CVE-2026-31443 Linux内核idxd驱动崩溃漏洞

/* * PoC for CVE-2026-31443 * Conceptual trigger for idxd driver crash. * Requires hardware support (Intel DSA) and driver loaded. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #define IDXD_DEVICE "/dev/idxd/control" int main() { int fd; printf("Attempting to trigger CVE-2026-31443...\n"); fd = open(IDXD_DEVICE, O_RDWR); if (fd < 0) { perror("Failed to open device (Check hardware/driver)"); return -1; } // Triggering error logic that leads to FLR and event log mishandling // Specific IOCTL or command depends on hardware configuration // This simulates the condition causing the NULL pointer dereference printf("Device opened. Interacting with driver to trigger error handling...\n"); // In a real scenario, specific operations would be performed here // to cause the hardware fault that triggers the vulnerable code path. close(fd); return 0; }