GHSA-c9q2-5c67-xg9p
A heap buffer overflow vulnerability exists in the DTLS 1.3 ACK serialization path of wolfSSL versions 5.9.0 and earlier. The issue arises from an integer truncation error when calculating the length of the ACK record-number list, leading to allocation of an undersized buffer that is subsequently overrun. This vulnerability was fixed in wolfSSL version 5.9.1.
GHSA-c9q2-5c67-xg9p
Description
A heap buffer overflow vulnerability exists in the DTLS 1.3 ACK serialization path of wolfSSL versions 5.9.0 and earlier. The issue arises from an integer truncation error when calculating the length of the ACK record-number list, leading to allocation of an undersized buffer that is subsequently overrun. This vulnerability was fixed in wolfSSL version 5.9.1.
CVSS v4.0
Affected software
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Weaknesses
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-c9q2-5c67-xg9p
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-6679"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 4.0
Threat ID: 6a3ef7e827e9c79719032d21
Added to database: 06/26/2026, 22:06:32 UTC
Last enriched: 06/26/2026, 22:36:42 UTC
Last updated: 06/27/2026, 00:11:15 UTC
Views: 2
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