CVE-2025-11931

HIGH

Wolfssl - Integer Underflow

Title source: rule

Description

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.

References (1)

[Issue Tracking, Patch] https://github.com/wolfSSL/wolfssl/pull/9223

Scores

CVSS v3 8.2

EPSS 0.0002

EPSS Percentile 4.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Classification

CWE

CWE-191

Status published

Affected Products (1)

wolfssl/wolfssl

Timeline

Published Nov 21, 2025

Tracked Since Feb 18, 2026