CVE-2026-6679 — DTLS 1.3 ACK serialization heap buffer overflow via integer truncation
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 …
Published: 2026-06-25 · CVSS: 8.8 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7