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Vulnerabilities CVE-2025-32989

CVE-2025-32989

Medium
Open
TLP:CLEAR

Gnutls: vulnerability in gnutls sct extension parsing

NVD CVE.org
Critical Infrastructure Data Exfiltration

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Description

A heap-buffer-overread vulnerability was found in GnuTLS in how it handles the Certificate Transparency (CT) Signed Certificate Timestamp (SCT) extension during X.509 certificate parsing. This flaw allows a malicious user to create a certificate containing a malformed SCT extension (OID 1.3.6.1.4.1.11129.2.4.2) that contains sensitive data. This issue leads to the exposure of confidential information when GnuTLS verifies certificates from certain websites when the certificate (SCT) is not checked correctly.

Details

CVSS Score
5.3
EPSS Score
1.18%

65th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Confidence
90%
Published
Jul 10, 2025
Last Modified
Aug 21, 2026
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