CVE-2026-43410 Linux内核stratix10-rsu空指针解引用漏洞

/* * PoC for CVE-2026-43410: Kernel NULL Pointer Dereference * Context: This vulnerability triggers during the driver probe phase * if RSU is disabled in FSBL. * * Note: This is a conceptual representation of the vulnerable logic. * Actual exploitation requires specific hardware (SoCFPGA Stratix 10) * and kernel configuration. */ #include <stdio.h> #include <stdlib.h> // Simulating the kernel channel structure struct svc_channel { void *data; }; // Simulating the vulnerable thread function void vulnerable_thread(struct svc_channel *chan) { printf("[+] Thread started, accessing channel..."); // The crash happens here because chan was freed but the thread still runs if (chan->data == 0x0) { // Simulating access at offset 0x00 or 0x08 printf("CRASH: NULL Pointer Dereference!\n"); // In real kernel: Oops: 0000000096000004 } } int main() { struct svc_channel *chan = malloc(sizeof(struct svc_channel)); chan->data = NULL; // Simulate Probe Failure printf("[*] Probe failed, freeing channel..."); free(chan); chan = NULL; // Logic bug: The cleanup didn't stop the thread registration // Simulate Thread Execution (UAF) // In the real bug, the thread continues to run with the old pointer value // stored in a global or closure that wasn't cleared. struct svc_channel *dangling_ptr = (struct svc_channel *)0xdeadbeef; // Simulation printf("[-] System Panic triggered.\n"); return 0; }