CVE-2025-11931

HIGH

wolfssl - Integer Underflow and Out-of-Bounds Access in wc_XChaCha20Poly1305_Decrypt

Title source: llm
STIX 2.1

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)

Core 1
Core References

Scores

CVSS v3 8.2
EPSS 0.0029
EPSS Percentile 20.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-191
Status published
Products (1)
wolfssl/wolfssl 5.8.4
Published Nov 21, 2025
Tracked Since Feb 18, 2026