CVE-2026-31619 Linux内核ALSA驱动越界读取漏洞

/* * PoC Concept for CVE-2026-31619 * This code demonstrates the vulnerable logic in the kernel driver. * Exploitation requires physical access or simulation of a Firewire device. */ #include <stdio.h> #include <stdint.h> // Simulated vulnerable array size #define ARRAY_SIZE 17 // Simulated vulnerable function logic void vulnerable_lookup(uint32_t status) { const char *efr_status_names[ARRAY_SIZE] = { "OK", "Error", ... // 17 entries }; // VULNERABILITY: No bounds check on 'status' before using it as index // If status is 0x80000000, this causes an out-of-bounds read/crash printf("Status: %s\n", efr_status_names[status]); } int main() { printf("Simulating malicious device response...\n"); // Malicious status value (EFR_STATUS_INCOMPLETE) uint32_t malicious_status = 0x80000000; // This would crash the kernel in the actual driver context vulnerable_lookup(malicious_status); return 0; }