Security Advisory

CVE-2026-6679

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-25 20:13:06

Last updated 2026-06-26 13:13:41

Assigner wolfSSL

CVSS score 8.8

State PUBLISHED

Description

A heap buffer overflow could occur in the DTLS 1.3 ACK serialization path before the connecting peer is authenticated. The buffer overflow was due to an integer truncation when computing the length of the ACK record-number list, causing an undersized buffer to be allocated and then overrun. This affects builds using DTLS 1.3 and wolfSSL version 5.9.0 and earlier. A fix was added to the 5.9.1 release.

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