Stack-based Buffer Overflow Affecting gnutls package, versions [0,]
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-GNUTLS-15126067
- published28 Jan 2026
- disclosed18 Nov 2025
- creditLuigino Camastra
Introduced: 18 Nov 2025
CVE-2025-9820 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Stack-based Buffer Overflow via the gnutls_pkcs11_token_init() function. An attacker can cause a crash or potentially execute arbitrary code by supplying a PKCS#11 token with a label longer than 32 characters, leading to writing past the end of a fixed-size stack buffer.