CVE-2025-11931 LOW

CVE-2025-11931: Integer Underflow Leads to Out-of-Bounds Access in XChaCha20-Poly1305 Decrypt

Vendor Wolfssl
Product wolfSSL
Weakness CWE-191
Published November 21, 2025
Last update December 8, 2025
View on NVD All CVEs

CVSS base score

2.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

November 21, 2025 CVE published
December 8, 2025 Record updated