What’s Vulnerable › Vulnerabilities
CVE-2025-11931: Integer Underflow Leads to Out-of-Bounds Access in XChaCha20-Poly1305 Decrypt
- Severity: high (CVSS 8.2 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-11-21 · updated 2026-10-19
- Weakness: CWE-191
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.
Affected products
- wolfSSL: 5.8.4
References
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