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

CVE ID : CVE-2025-11931

Published : Nov. 21, 2025, 11:15 p.m. | 2 hours, 1 minute ago

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.

Severity: 2.1 | LOW

Visit the link for more details, such as CVSS details, affected products, timeline, and more…