CVE-2026-5460
Published: Apr 9, 2026
Modified: Apr 10, 2026
Description
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 TLSX_KeyShare_ProcessPqcHybridClient() in src/tls.c, the inner function TLSX_KeyShare_ProcessPqcClient_ex() frees a KyberKey object upon encountering an error. The caller then invokes TLSX_KeyShare_FreeAll(), which attempts to call ForceZero() on the already-freed KyberKey, resulting in writes of zero bytes over freed heap memory.
| Vendor | Product | Versions |
|---|---|---|
wolfSSL | wolfSSL | affected 0 - < 5.9.1 |
Weaknesses (CWE)
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