Heap use-after-free on read during bidirectional (D)TLS shutdown

In all builds that make use of (D)TLS, including default builds, there is a series of conditional states during the TLS shutdown which could lead to a heap-use-after free. If an application ended up getting a partial wolfSSL_read() which is sometimes caused by a small user buffer passed in, then called wolfSSL_shutdown for a bidirectional close and attempted to wolfSSL_read() again while the peer continues trying to send data during the shutdown it would lead to a state where a potential heap-use-after free happened.

Problem type

CWE-416 Use After Free

Affected products

wolfSSL

wolfSSL

<= 5.9.2 - AFFECTED

References

github.com

https://github.com/wolfSSL/wolfssl/pull/10863

JSON source

https://cveawg.mitre.org/api/cve/CVE-2026-15442

Click to expand

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    "dateUpdated": "2026-09-27T09:24:31.594Z",
    "dateReserved": "2026-07-10T19:09:12.486Z",
    "datePublished": "2026-09-27T09:24:31.594Z",
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