CVE-2026-5460 Heap Use-After-Free in PQC Hybrid KeyShare Error Cleanup in wolfSSL TLS 1.3

A heap use-after-free exists in wolfSSL's TLS 1.3 post-quantum cryptography PQC hybrid KeyShare processing. In the error handling path of TLSXKeyShareProcessPqcHybridClient in src/tls.c, the inner function TLSXKeyShareProcessPqcClientex frees a KyberKey object upon encountering an error. The call...

CVE-2026-5460

Vulnerability summary (CVE-2026-5460) : A heap use-after-free exists in wolfSSL’s TLS 1.3 post-quantum cryptography (PQC) hybrid KeyShare processing. In the error path of TLSX_KeyShare_ProcessPqcHybridClient() (src/tls.c), TLSX_KeyShare_ProcessPqcClient_ex() frees a KyberKey object on error. The ...