This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-6679 →
DEBIAN-CVE-2026-6679
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...
Original description
The description as published by the source.
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: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
wolfssl
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
wolfssl
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- advisory security-tracker.debian.org