Integer overflow in Wolfssl
CVE-2025-11931
Integer Underflow Leads to Out-of-Bounds Access in XChaCha20-Poly1305 Decrypt. This issue is hit specifically with a call to the function wc_XChaCha20Poly1305_Decrypt() which is not used with TLS connections, only from direct calls from an application.
EPSS: 0.003 (24.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.
Affected products
- Wolfssl — versions 5.8.4, 0
Weakness classification (CWE)
References
- facts@wolfssl.com (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2025-11931?
- CVE-2025-11931 is a high-severity vulnerability in Wolfssl, classified under Integer Underflow. CVSS score: 8.2/10. Published 2025-11-21.
- How severe is CVE-2025-11931?
- High severity. CVSS v3 base score is 8.2 out of 10.