CVE-2026-31730 is a high-severity vulnerability in the Linux kernel's fastrpc driver where a double-free of the cctx->remote_heap pointer can occur. This happens because the pointer is freed on an error path without being cleared, leading to a second free during later cleanup. The flaw was identified through static code analysis and manual review. No hardware testing or known exploits in the wild have been reported. The issue allows potential corruption of kernel memory, impacting confidentiality, integrity, and availability.