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

Overview

Severity

High (CVSS 8.2)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2025-Nov

Released

2025-11-25

Last Updated

2025-12-03

EPSS Score

0.02% (percentile: 5.6%)

Affected Products (2)

Other

• 20085-17086
• 19283-17084

Revision History

• 2025-11-25: Information published.
• 2025-12-03: Information published.